I'm trying to install ubuntu server using virtualbox 4.0.4 in a ubuntu 10.10 host OS. I have the iso image on my hard drive which I used to perform the install. I edited the settings and added this image at the storage section, selected it as a primary master, so I could boot from it and start the install process.

But now, each time I start the installation, at the very beginning or if I'm lucky, after I click on the install link at the welcome screen, the process hangs and all the computer is blocked. This happened 3 times already.

I even tried to perform the installation using an old CD I had with the 9.10 server version, thinking that the iso image might be the issue, but the problem still persists.

I dont know what could cause this problem. My computer is a dell laptop with AMD processor (I dont know if this is important). Any help is very appreciated.