Roots and VIrtualBox

Hi, I’m trying Roots for the first time, and I would like to test with IE7-8, so I need a virtual machine to do that (I’m on win7).
In my VM, I access to my local website : http://192.168.x.x/mywebsite/
I solved all the problem of denied access, but I still have one. All links are absolute :…
If I try in FireFox on my computer, the links are relative (/mywebsite/wp-content/…), but with IE in the VM they are absolute :confused:
It’s maybe an Apache configuraiton problem, but I don’t know wich it is.

Thanks a lot,