VirtualBox on Windows RC 7100 not working properly. ¿Hints?

Question

I installed Windows 7 RC build 7100 64 bit, When I try to boot the installer of Debian Lenny or Squeeze inside VirtualBox it stucks on analizing the cd, or installing packages.

The Cds are working perfect, with them I was able to install directly on the computer, and previously with Windows build 7000 I didn't have this issue. I'm on a 64bit host and my guest is 32 bit.

Anyone having the same behavior? Or a fix to this problem?

P.D:A friend had the issue on a Windows 64 bit trying to install Ubuntu 9.04, but fortunately he was able to finish the installation.

Answer 1

I used the iso image directly , on CD/DVD rom used the iso image, it looks like the problem is the cd syncing.