I have backtrack 4 r2, i checked the MD5, and i am running with virtualbox.

I select Start BackTrack FrameBuffer (1024x768). Then i get to the prompt and input 'login', then 'root', then 'toor'.

'Login incorrect'.

From everything i have read, this should have definitely worked. What do i do next??

The only other thing which may be worth mentioning, although i don't think it is relevant, is that i get the following error: 'Unable to locate IOAPIC for GSI 1', 12, 7