Ciao, ho un progetto di una solution che nella BIN utilizza una DLL generata da un secondo progetto della solution

In fase di esecuzione ottengo questo errore

Server Error in '/Sinaxi' Application.
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Assembly 'Flan.Controls, Version=0.2.2593.31278, Culture=neutral, PublicKeyToken=null' contains a Web resource with name 'Flan.Controls.UpdatePanelPopupExtender.UpdatePane lPopupBehavior.js', but does not contain an embedded resource with name 'Flan.Controls.UpdatePanelPopupExtender.UpdatePane lPopupBehavior.js'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: Assembly 'Flan.Controls, Version=0.2.2593.31278, Culture=neutral, PublicKeyToken=null' contains a Web resource with name 'Flan.Controls.UpdatePanelPopupExtender.UpdatePane lPopupBehavior.js', but does not contain an embedded resource with name 'Flan.Controls.UpdatePanelPopupExtender.UpdatePane lPopupBehavior.js'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.


Cosa ho sbagliato?

Grazie