TOPIC: HELP! I Can't Auction ANY Of My Items!

Yesterday I won a couple of weapons cases and tried auctioning them. However everytime I tried making the auction post, the chat said "You can not do this whilst trading". I hadn't traded with anyone and had restarted my game twice, which lead to no effect.

After restarting my computer I could auction 3 items until the same message appeared and nothing has fixed the problem since. PLEASE HELP!

You can only auction 3 items at once.

Wow really? Such a simple answer that no admins know. Oh well, cheers