could not load the assembly
I have created simple workflow based on Professional K2 blackpearl book in chapter 9. After I created an instance and login using user account, I opened my ClientEventPages and get this error messages "Could not load the assembly 'InformationRequest'. Make sure that it is compiled before accessing the page."
I am a beginner in K2 so I don't know what should I do to get rid of this error. If there is any information about what should I do to fix this error, please let me know.