Error in Creating a Web Client factory solution

Question

I have created a solution with follwoing structure:
1: Shell (with my Presentor class and Interface class)
2:Web Application(Which will communicate with presenter class, having implementation of the method which is declared in Interface class).
I did every thing in an expected way but it gives me error as
"Cannot create instance of abstarct class"..
I am wired..
Somebody have some clue?
Thanks.