new installation changed everything

Last week I upgraded my system from WinXP Pro to Vista Beta build of May2006. My system on XP Pro was very well connected on the network and using Exchange server 2003 under SBS2003.
When I did the upgrade vista lost all the configurstion. I could only surf the network but I couldn't use MS Outlook 2003 and couldn't access/browse the network.
So what one should in this case to avoid these kind of problems.
Thnx in advance for your help.

Last week I upgraded my system from WinXP Pro to Vista Beta build of May2006. My system on XP Pro was very well connected on the network and using Exchange server 2003 under SBS2003.
When I did the upgrade vista lost all the configurstion. I could only surf the network but I couldn't use MS Outlook 2003 and couldn't access/browse the network.
So what one should in this case to avoid these kind of problems.
Thnx in advance for your help.