visual studio 2008 - Why would breakpoints in VS2008 stop working? -

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i have c# asp.net web app. breakpoints in database layer no longer stopping execution breakpoints in ui layer still working okay. can hazard guess why might happening?

i've checked usual suspects (debug build on projects) , recompiled projects in solution...

i ensure ui layer referencing appropriate 'debug' .dll's. i'd consider pressing ctrl+alt+u (modules view) when you're debugging see if symbols loaded bll , dal .dlls. if not visual studio unable find .pdbs file. debug files (.pdbs) in same directory .dlls being referenced modules window?


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