The system cannot find the file specified

Until yesterday, my webservice was working fine on my local system today, when I run Webservcie or any web project from VS2005, I get the following error

Server error in application "/ MyWebService".

The system cannot find the file specified. (Exception from HRESULT: 0x80070002) Description: An unhandled exception occurred during the execution of the current web request. Review the stack trace for more information about the error and how it occurs in your code.

Exception Details: System.IO.FileNotFoundException: The system cannot find the file specified. (Exception from HRESULT: 0x80070002)

Please help me