Flash CS5 - Air Debug Launcher issue

Hi folks.

I’ve suddenly started having issues whereby when I create an Adobe AIR 2 file, and click Control > Test Movie > In AIR Debug Launcher there is no window/preview which gets launched? Nothing appears to be happening?

I’m trying to think if I’ve been messing about with anything. I thought it may be something to do with java, so I’ve installed the latest version of JRE and it’s still the same.

Is there any way to fix this?

Thanks.