Zanth,
I'm sorry for the slow response to this thread.
Are you still having this issue? I suspect that the issue is that you are a commissioner, controlling a team using the "Act As" feature, instead of actually being the full-time manager.
When you "act as," you do not receive messages such as trade responses or FA responses. To do that, you must actually sign on as the full-time manager of that team through the Available Jobs page.
Please let me know if this helps at all.
Thanks,
Steve