Handling project references (.net 3.0)

Hi everyone,

I've a program which is a kind of an automated tester for our application. This program is actually a plugging for the app. Let say this program dll is Tester.dll.
Then i have another program which handles this Tetser programs results output. Let say this program is TestResultComparer.dll. I have an project reference from Tester project to TestResultComparer project. and also a reference for that Compare.dll as well. I've placed newest version of Tester.dll in the plugins location of our app.
But when i run the app and debug the Tester project with attached to that it throws an error saying the following message.

{System.IO.FileNotFoundException: Could not load file or assembly 'TestResultComparer, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
File name: 'TestResultComparer, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
at Ifs.Application.ApplicationTester.ResultSerializer.SerializeXml(List`1 resultObjects, String deployFilesPath)
at Ifs.Application.ApplicationTester.ResultSerializer.SerializeResult(List`1 resultObjects, List`1 componentList, TestSequence testSequence, String totalRunningTimeForTestes, List`1 excludedForms, Boolean splitTests, Boolean startSummary, Boolean endSummary)


I checked the all paths in the references but it seems nothing wrong with them. Is this something messed with project references ? Do i have to do something else other than adding the references ?