SharePoint Services – Error Loading Page

Hello,

We have SharePoint Services 3.0 installed on a VM (Windows Server 2008 Hyper V). It has been working fine for many months except today it only works either when one is login directly on the SharePoint Hyper V or the Windows Server 2008. If one tries to access SharePoint from any other PC on the network, the site does not load (times out) or some web parts are not loaded completely. Any help would be greatly appreciated.

Ed