Sage CRM v7.0.d.2
Custom entity called Service created using the Advanced Customization Wizard
Customization is done using .net, service.dll has a RunDataPage method
The Service entity has communications
The comm_serviceid field is a Search Select Advanced field that works
Find Service is available in the Regarding field on the communiations screen
When you try to navigate to the linked service you get 404-Page or Directory Not Found
In view source the hyperlink is to \crm\opportunity\opportunitysummary.asp
Creating an opportunitysummary.asp file to display Hello World gets a 500-Internal Server Error
Any thoughts on linking to custom entity from the communications Regarding field?