Hi SanguineOO7,
may be there is some problem in the navigation your trying to do , check the business logic you have written in the inbound and outbound plugs,
Remember one thing that when you provide a navigation id its a case sensitive thing, so please make sure that you have provided everything properly
Refer the following link, it may be helpful in some way : http://www.****************/Tutorials/CRM/WEBUI/Index.htm
Regards