ABAP Server Proxy Issue

Guys,

For a scenario i am using ABAP Server Proxy.

I have successfully generated the proxy object but when i want to put some logic in server proxy by double clicking on execute_synchronous, i am getting nothing and when i am trying to use the toggle button to bring the proxy in editable mode i am getting the message that " you can't edit proxy objects ".

What is the solution....

Regards,