problem with recording in ET

i got a really weird issue with recording in ET with anti aliasing on any number but the program default, when i start recording with it i get a black screen..
the funny thing is, it actually records screenshot, but i cant c when the frags end..
i got a radeon x800 with thew newest catlyst drivers, i used omega as well and it gives me the same problem..

anyone got a clue? thx :<