Error after upg to Beta 3

Error after upgrading to Beta 3

Hi,

I was using Beta 1 without any major problem.

When Beta 3 arrived, i decided to upgrade. The installation went smoothly but now when i try to start the VM I get the following message :

Unable to connect VM to port %1.

Any idea of what that means ? Is there any fix for it ?

I even tried to revert to Beta 1 but now i get this meesage every time.

Any help appreciated.

Thks in advance !