Thanks for the heads up Mobius

The latest FSO release I tested with was 3.6.10.
TCP was running fine on that version.
If I uderstand well from the first post the campaign was played on FS retail, then another campaign (?) was not running well on FSO.
If that's the case TCP was probably installed for retail FS.
To play it in FSO you need to install the FSO patch from here:
http://www.pgrunt.com/tcp/index.htmThen move the campaign file (ATCP.vp) from the main Freespace2 directory into the one created by the patch.
The patch readme explains all this in detail.
I hope it helps.