From: http://hi.baidu.com/ibyron/blog/item/c9eb60b32e9848afd8335a1a.html
Using CS3 today, we found that the service has only been used for five days. Using the original keygen serial number cannot be used for cracking. I finally solved the problem with the help of experts, but I still don't know if this situation will happen again. It is said that Adobe has also begun network anti-cracking.
1. delete an object
C: \ Documents and Settings \ All Users \ Application Data \ FlexNET \ adobe_00080000_tsf.data
2. Start Adobe CS3ProgramWait a moment until the page is re-activated;
3. Click "Other activation options"
4. Select "Activate by phone" and press "OK"
5. Run the keygen registration machine, copy the activation code to the registration machine, and press "Activate" to obtain the authorization code.
6. enter a new authorization code and press "Activate"