Issues with creating unit tests - ASP C#

Hi all I'm trying to create a test class and I'm having 2 issues.

1. It's taking forever to run

2. When I debug the test class method I keep getting this error

Warning 25/04/2015 12:20:18 Warning: Test Run deployment issue: The assembly or module 'App_Code' directly or indirectly referenced by the test container 'c:\users\tunde\documents\visual studio 2010\projects\carfindertesting\bin\debug\carfindertesting.dll' was not found. TUNDS Error 25/04/2015 12:20:29 Test host process exited unexpectedly. TUNDS

I have no idea why this is happening could anyone offer any help on how I can get this issue fixed thanks.