What version of VirtualBox are you using? Have a look at the advanced options, there should be a 'Enable IO APIC' option. If it's checked then 'uncheck' it and try again.
PS: Forgot to mention. Change your thread title to something more descriptive if you want to draw attention to your problem/question.
Last edited by EricTRA; 05-13-2011 at 01:17 PM.