[Bacardi]

...could be it this problem, from client side .
cl_allowupload
cl_allowdownload
sv_allowupload
sv_allowdownload

Can't remember, how those suppose to be.

*edit
Before you change settings, check your values, in your own game.
Paste this in console
cl_allowupload;cl_allowdownload;sv_allowuploa d;sv_allowdownload

*edit
By the way, is your upload host in same place where you are gaming (LAN) or some where else location ?