Sim900 & FTP

Hello all. I have a problem upload data of the file using SIM900 FTP connect.

First using "get" ftp method was successful (Answers ("AT+FTPGET=2,1024").

But Next using "get" ftp method shows "AT+FTPGET: 2, 0".

That's mean it gives information about absence of the uploading data.

What kind of problem it may be?

: AT+FTPCID=1 \r
 
- OK
 
: AT+FTPSERV="XXX.XXX.XX.XX" \r
 
- OK
 
: AT+FTPUN="login" \r
 
- OK
 
: AT+FTPPW="password" \r
 
- OK
 
: AT+FTPGETPATH="/" \r
 
- OK
 
: AT+FTPGETNAME="text.txt" \r
 
- OK
 
: AT+FTPGETNAME="text.txt" \r
 
- OK
 
: AT+FTPGET=1 \r
 
- OK
- +FTPGET:1,1
 
: AT+FTPGET=2,1024 \r
 
- AT+FTPGET=2,0 OK