FTP Dreambox 500c

Hi All,
I am having a problem FTP'ing a small file to a dreambox (cable TV box).
The file is only 33kb but when i try to send it it starts transferring at a slow speed and then gets slower and stops and only tranfers about 2kb?
The funny thing is I can FTP from the box to the pc and its really fast and has no problem with any file size?
I am two full days trying to get this working.
Any ideas would be greatly appreciated.
Many Thanks
Sham...

ps I have tried 4 different FTP programs just in case and they all fail.