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This is a quick one. The other day I ran into an ASP.NET error basically indicating one of my virtual directories was running as an ASP.NET 1.1 app instead of an ASP.NET 2.0 app. “Easy enough, I’ll just go ahead and change it in the IIS mmc snap-in” I thought. To my surprise, the virtual directory properties window was missing the ASP.NET tab. I first went and made sure ASP.NET 2.0 was enabled in the web services extensions portion of the IIS snap-in, it was. I then used google, NOT LIVE SEARCH, to try and find an answer. After a ton of digging, I found that most of the time the reason this happens is related to a common Windows problem. Somehow, a piece of the registry gets hosed. I tried the fix mentioned in that forum post and it didn’t work. Finally, I found the reason for my particular issue. This one blows my mind. I installed vmware server because M$ Virtual PC is a piece of crap (it wouldn’t let me install Ubuntu). Somehow, vmware server removed my ASP.NET tab. To fix this I had to do the following (found here):

1) Stop the IIS Admin service (and any services that depend on it)
2) Open C:\WINDOWS\system32\inetsrv\MetaBase.xml in notepad or your favorite XML Editor. _DELETE_ the line that reads ‘Enable32BitAppOnWin64=”TRUE”’
3) Start -> Run -> iisreset

I don’t know who to blame here, M$ or vmware. Since it’s usually M$’s fault, I’ll blame them. I guess if Virtual PC weren’t so crappy I wouldn’t have had this issue at all.



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