Error when transfering files #123

[rylite]

I have been trying to transfer a video file. I have about 50 of them and only about half of them transfer. the other half leave this error message. What should I do? Please help me. This is the error message left for just one of them.

TYPE I
200 Type set to IMAGE.
PASV
227 Entering Passive Mode (192,168,1,109,8,15)
STOR Friends - 1x02 - TOW The Sonogram At the End.avi
125 Data connection already open; Transfer starting.
426 Couldn't open file for writing, error#123
Transfer Failed!
PASV
227 Entering Passive Mode (192,168,1,109,8,16)
STOR Friends - 1x02 - TOW The Sonogram At the End.avi
125 Data connection already open; Transfer starting.
426 Couldn't open file for writing, error#123
Transfer Failed!
PASV
227 Entering Passive Mode (192,168,1,109,8,17)
STOR Friends - 1x02 - TOW The Sonogram At the End.avi
125 Data connection already open; Transfer starting.
426 Couldn't open file for writing, error#123
Transfer Failed!
PASV
227 Entering Passive Mode (192,168,1,109,8,18)
STOR Friends - 1x02 - TOW The Sonogram At the End.avi
125 Data connection already open; Transfer starting.
426 Couldn't open file for writing, error#123
Transfer Failed!
TYPE A
200 ASCII type transfers selected
PASV
227 Entering Passive Mode (192,168,1,109,8,19)
LIST
150 Opening ASCII mode data connection for /bin/ls.
226 Transfer complete.
List Complete: 69 bytes in 0.09 (0.07 KBps)
Transfer queue completed
1 File failed to transfer