Using the CTRL key in Screen Sharing

I am using native OS X screen sharing to share my Mac OS X Lion iMac screen on my Mac OS X Snow Leopard MacBook Pro. I am using it to run Xcode since I can't run the latest version of Xcode on my Snow Leopard machine (2006 MacBook Pro). It works great with one exception - I can't seem to find out how to do a CTRL-drag operation. In Xcode, you use CTRL-drag to link objects to their controller. It works fine if I perform the operation on the iMac that is sharing its screen. But it doesn't do anything on the MacBook Pro screen sharing session. Is there a way to get the CTRL-drag to work in the screen sharing session?