Why can't I post in the Trade House anymore?

As thread question states.

I've checked my mail, I HAD items for sale in my consignments but it's all gone ( minus what I sold over night ) now I can't post any item to the AH anymore ( "Post item" is greyed out )

Any ideas why???

Got stuff I need to sell and it's taking up inv space and bank is full

Thanks in advance guys / gals