How to import user packages?

Hi,
If the imported package is not a default package how can I import that.
I need to use a java class in my ASP for password hashing. Now my java class is using a package
" import au.net.aba.crypto.provider.ABAProvider;"
I place the class file in winnt/java/trustlib directory and placed the au folder in winnt/java/class directory. My ASP page is giving error "ClassFactory cannot supply requested class" when i tried to create object for the java class. Please give me the solution asap.