Certification

Error when trying to link to event registration

I am writing a custom asp.net application in C# for a client in Brisbane (REIQ). This application is integrated into iMIS and will be accessed from the Certification module.
One of the pages has a datagrid which has a hyperlink column. When you click on the link on this column, it should take you to that event registration.

The URL I am using is:
e.g.
imisnet:event/4010/b51192e0-332d-40c0-8c25-e777ffe750c0-key_event