FOR ALL THOSE THAT HAVE THE SAME ISSUE WITH WINDOWS XP

1. Choose Start > Control Panel, or Start > Settings > Control Panel.
2. Open the Administrative Tools Control Panel.
3. Double click "Services".
4. Scroll down to the FLEXnet Licensing Service on the list of services and double-click the service to open its properties.
5. Right click one the name FLEXnet Licensing Service and choose Properties
6. Change the Startup type to Manual
7. Click Apply
8. Click the Start button to start the service.
9. Click Apply, then OK. Close Services, Administrative Tools, and the Control Panel.
10. Relaunch your CS3 application.

Thaken from <http://kb.adobe.com/selfservice/viewContent.do?externalId=kb401528>

It worked for me.. hope it will others.

Cheers

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