I get the following problem when trying to use the System.Web.Mvc.Compare attribute on my model.

Object reference not set to an instance of an object.

Call stack location:

Griffin.MvcContrib.DLL!Griffin.MvcContrib.Localization.LocalizationModelValidatorProvider.MyValidator.Validate() Line 194 + 0x35 bytes

Source file information:

Locating source for 'D:\Tfs\External\griffin.mvccontrib\griffin.mvccontrib\source\Griffin.MvcContrib\Localization\LocalizedModelValidatorProvider.cs'. Checksum: MD5 {a4 85 85 22 c3 89 75 c4 a7 85 35 77 1e a4 29 1f}
The file 'D:\Tfs\External\griffin.mvccontrib\griffin.mvccontrib\source\Griffin.MvcContrib\Localization\LocalizedModelValidatorProvider.cs' does not exist.
Looking in script documents for 'D:\Tfs\External\griffin.mvccontrib\griffin.mvccontrib\source\Griffin.MvcContrib\Localization\LocalizedModelValidatorProvider.cs'...
Looking in the projects for 'D:\Tfs\External\griffin.mvccontrib\griffin.mvccontrib\source\Griffin.MvcContrib\Localization\LocalizedModelValidatorProvider.cs'.
The file was not found in a project.
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\crt\src'...
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\mfc'...
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\src\atl'...
Looking in directory 'C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\atlmfc\include'...
The debug source files settings for the active solution indicate that the debugger will not ask the user to find the file: D:\Tfs\External\griffin.mvccontrib\griffin.mvccontrib\source\Griffin.MvcContrib\Localization\LocalizedModelValidatorProvider.cs.
The debugger could not locate the source file 'D:\Tfs\External\griffin.mvccontrib\griffin.mvccontrib\source\Griffin.MvcContrib\Localization\LocalizedModelValidatorProvider.cs'.