Thx for helping
I followed the steps in link but it didn’t solve my problem. Im running on a clean installation of OS X (10.6.1).
Sounds as if you've run into this known issue on Snow Leopard:
FB-22869 - Licensing error prevents Flash Builder from launching on OSX 10.6.1 (Snow Leopard).
After installing on 10.6.1, run the mini-installer found in your Flash Builder installation folder:
Let us know whether or not that resolves the problem,
That seems to have solved the problem!