Unable to run Leak Instruments in xcode

I am using xcode 4 and tried to run the leaks tool by clicking on the Product > Profile button in the top menu.

I checked that I am using the development p开发者_高级运维rovisioning profile when running the tool (no issues with running the app in 'run' mode'.

However, I got the following error. Any advise on how I can overcome this problem?

I got around it by running normally via Xcode to install the app but then quitting and relaunching the app directly from Instruments.