I am using IS version ::7.1.2.0.28 and Developer Version:: 7.1.0.0.149.
when i am trying to open developer after login it shows message like “Backwards compatibility is not supported between the Developer version and the Server version you are using. Developer will now disconnect.”
I am sorry for my before reply, it should be in the other way…
i think we can use 6.5 developer to connect to 6.1.5 IS ans same think is happening with you…
so please try upgrading the developer verson as of IS