Package Tracking Probem with JSP Pages (Calberson)

There’s a standard function in Navision which allows you to track a package via the Internet from a Posted Sales Shipment (Function\Track Package) We’re having a problem with one of our Shipping Agent (Calberson), they offer the possibility of tracking over the internet but the problem is that you have got to log in (with a user name and a password, it’s a JSP page; for security reason I believe) before you can start to track your package. Has anyone manage to succesfully track packages with Calberson ??? (I know it works fine with DHL, UPS and a few others …) ######