Orca and groups forum write problem

I can't on all my domeins use orca or groups forum. When I try to write a message the page is loading and then the browser(s) is hanging. 

This is into Opera, Internet explorer, Firefox... 
There is something changed but what, someone has a idea maby??

this problem first find on 6.1.4 but after updating to 6.1.5 also not working.

Thanks for responding...