The name 'xxx' does not exist in the current context

hi ,
my application in vs2005 / 2.0 framework , right now i change it with VSD08 /3.5 framework
according when i change it open it with 08 at first time it get ask me ( you want to convert the application framework 2.0  to 3.5 )
i said yes , after that i was trying to run the application it get works on that machine means on ( locahost)
but not able to access that on netowork
its shows an error :
The name 'xxx' does not exist in the current context ( if i try to run any function within app_code ) then it shows me shuch error
i wan also rebuild my appliciton , but noting get happen
shall i create a new project and then copy my old code ? plz help





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