Hello, Please Help us...!

I have a big problem ,so i searched on google and other search engine ,then I realized that so many other people have the same problem and they, all, have'nt been able to solve it.
My problem is:


I want to import a dll in asp.net, and I have a major problem

First i want to say that this dll works fine in a windows application written in C#, and It works fine when...