Debugging Messed Up On Classic ASP After Installation Of 2005 Express

I'm working on XP IIS5.1 in classic ASP 3.0. After the installation of the 2005 Express Suite and the beta .net2 framework that ships with it(http://lab.msdn.microsoft.com/express/vwd/) the debugging with classic ASP has an odd behaviour.

I use option explicit on all pages. When the parser finds an undeclared var or function or there is some error in a stored procedure (not in the ASP page but in the SP itself)
I receive no error reporting. The page simply renders till that point and stops.

All the other errors are reported as usual.