This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Yep, that is the problem. The method should not have a return value (and no arguments). Also as mentioned, you normally want to test something in your method and therefore use some assert method. In this case it looks like you want to do something like: