Air for android - Can't upload to ftp

i'm trying upload simple text file ftp, code works on pc.

on android app connects succesfully ftp when try upload file "2031:error #2031: socket error."

any ideas?

 

the code (from http://suzhiyam.wordpress.com/2011/04/) is:

 

import flash.events.progressevent;

import flash.events.event;

import flash.net.socket;

import flash.events.ioerrorevent;

import flash.errors.ioerror;

import flash.filesystem.filestream;

import flash.filesystem.file;

import flash.utils.bytearray;

import flash.events.mouseevent;

msg.text="wait! connecting ftp server!"

//

var ftp_host:string = "*****";     //ftp settings correct in original code...

var ftp_port:number = 21;

var ftp_username:string = "*****";

var ftp_password:string = "*****";

//

//in demo manually entering remote servers folder upload or download should happen

var remotefolderstr:string;

var localfolderstr:string;

var remotefile:string;

//socket instance used connect ftp server

var s = new socket(ftp_host,ftp_port);

s.addeventlistener(ioerrorevent.io_error,onioerr);

s.addeventlistener(progressevent.socket_data, onreturndata);

s.addeventlistener(event.connect, onconnecthandler);

//

//socket instance used connect receive data sent ftp server

var r:socket = new socket();

r.addeventlistener(progressevent.socket_data, onservdata);

r.addeventlistener(event.connect, onpasvconn);

r.addeventlistener(ioerrorevent.io_error,onioerr);

//for every command client sends ftp server server returns message return codes

function onreturndata(evt:progressevent)

{

    var d = s.readutfbytes(s.bytesavailable);

    trace(d);

    //check here complete list of return codes , meaning

    //- http://en.wikipedia.org/wiki/list_of_ftp_server_return_codes

 

    // return message have 3 digit return code followed space , related message

    // if 3 digit return code followed "-" multiline message

    //-wait until line 3 digit code followed space delivered

    if (d.indexof("220 ") > -1)

    {

        msg.text="logging in ftp server!"

        //connected ftp server send user name server

        s.writeutfbytes("user "+ftp_username+"\n");

        s.flush();

    }

    if (d.indexof("331 ") > -1)

    {

        //username accepted send password server

        s.writeutfbytes("pass "+ftp_password+"\n");

        s.flush();

    }

    if (d.indexof("230") > -1 && d.indexof("ok.") > -1)

    {

        msg.text="log in successful!"

        //password accepted - lets enetr passive mode , retrive list of files directory

        //first enetr passive mode

        //s.writeutfbytes("pasv \n");

        //s.flush();

        

    }

    var = d.indexof('227');

    if (a > -1)

    {

        //entering passive mode message returned along details of ip , port address returned

        //-we have connect address receive data

        //format of message be: 227 entering passive mode (209,190,85,253,148,206)

        //the data inside brackets ip , port address, first 4 numbers represent ip , last 2 port

        //the port value have calculated multiplying 5th number 256 , adding 6th number it

        //here in example ip 209.190.85.253 , port (148*256)+206 = 38094

        var st = d.indexof("(",a);

        var en = d.indexof(")",a);

        var str;

        str = d.substring(st + 1,en);

        var a2 = str.split(",");

        var p1 = a2.pop();

        var p2 = a2.pop();

        var ip:string = a2.join(".");

        var port:int=(p2*256)+(p1*1);

        r.connect(ip, port);

    }

    if (d.indexof("226 ") > -1)

    {

        //data transfer completed

        //s.writeutfbytes("quit \n");

        //s.flush();

        if (process=='download')

        {

            msg.text="download_complete"

            

        }

        if (process=='upload')

        {

            msg.text="upload_complete"

        }

        dispatchevent(new event("datareceived"))

    }

    if (d.indexof("221 ") > -1)

    {

        //logged out server

    }

    //response code 150 sent server whenever data connection established after send 'pasv' command

    if (d.indexof("150 ") > -1)

    {

        if (process == 'upload')

        {

            //once data connection established can start sending data server

            startsendingdata();

        }

    }

}

function onconnecthandler(evt:event)

{

    msg.text="connected ftp server!"

    trace("connected ftp server");

    //client has connected ftp server

}

 

function onpasvconn(evt:event):void

{

    trace("connected data port");

    

    //s.writeutfbytes("list /your/folder/path\n");

 

    if (process=='upload')

    {

        //to upload file send following command

        //stor command followed space , path wher store file in remote server

        //-with name of file saved as..you can provide name extension

        s.writeutfbytes("stor /test.txt\n");

    }

    s.flush();

}

function onservdata(evt:progressevent):void

{

    //data received server thro data port

}

function onioerr(evt:ioerrorevent)

{

    trace(evt.errorid+":"+evt.text);

}

//

var process:string = "";// variable store action being performed

var writetostream:boolean;//not used here

var localfile:file;//local file uploaded

var localfolder:file;// local folder downloaded file stored

var interval:number;

var buffersize:int;

//

 

btn_upload.addeventlistener(mouseevent.click,initupload);

function initupload(evt:mouseevent=null):void

{

    //called when upload event triggered

    startuploadprocess();

}

 

function startuploadprocess():void

{

    process = "upload";

    //you need pass command 'type i' set data transfer mode binary

    s.writeutfbytes("type i\n");

    s.writeutfbytes("pasv \n");

    s.flush();

}

 

function startsendingdata():void

{

    var texttoupload:string = "this test";

 

    buffersize = texttoupload.length;

   

    var ba:bytearray = new bytearray();

   

    //store info want upload in bytearray here

    ba.writemultibyte(texttoupload, "iso-8859-1");

   

    r.writebytes(ba, 0, ba.bytesavailable);

    r.flush();

}

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