using statement in asp.net web forms works locally but not live?

UPDATE : is there any iis 7 setting which might cause this issue? I recently moved to iis 7.0.

So I am having this weird issue where my code works locally but not when i deploy it live. Fo开发者_JS百科r example -

Employee e= new Employee();//does work locally 
Employee e= new Employee(); // does not work live..says cannot convert Employee to  MyLibrary.Model.Employee
MyLibrary.Model.Employee e= new MyLibrary.Model.Employee();////works live

So for some reason from the above code you can see it is not basically finding my using statements in the file.Although I have them it asks me to declares its full qualified name. Does anyone know what is happening?

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The only time I have seen problems like this when dealing with ASP.net is when a stale assembly has been cached.

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You probably don't have MyLibrary.Model.dll referenced in the live build.

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Do you have two different assemblies referenced that both define an "Employee" object?

If so, you will need to fully qualify the objects.