.Net remoting

Question

I'm trying simple desktop application in vs2010. Here I wanted to separate presentation and business tiers. Then I used .net remoting technique to separate this and my windows forms application is in one solution and business tier exists as a console application and it is  in another solution.
Console application is taken as the server and windows forms application is taken as the client. But when start debugging presentation(forms application) an argument null exception occurs at places where calling business layer class methods.
If anyone have an idea to solve this,please let me know.

Thanks