Hi Reisel -
This is a default setting change in IIS7 to keep debug information more secure. You can enable ASP debug information in the Inetmgr admin tool by browsing to the "ASP" feature and changing the "Send Errors To Browser" setting to "true". (you can find that setting by expanding compilation, and then expanding debugging properties).
Here is an image to help out:

Click here for a full size image.
You can also set this globally, on the cmd-line, by running the following command:
\Windows\System32\inetsrv>appcmd set config -section:asp -scriptErrorSentToBrowser:true
good luck!
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Bill Staples
Product Unit Manager, IIS
blog:
http://blogs.iis.net/bills