upgrade to 3.0 and XP activation

I've just upgarded to Parallels desktop 3. (4128), I use imac intel, Tiger, XP home.
after the upgrade, windows says it has to be reactivated. But if I ask for this reactivation, I get a blank (blue) window, and nothing else happens. The activation function seems not to work any more.
note : I've compressed my XP with PD 2.5 before.
Do you know how to solve this issue ?
thanks

 

Hello imacjim

You should use the Windows XP Setup program to repair the installation. To do this, follow these steps:
1. Use the Windows XP CD-ROM to start your VM(Change boot sequence to CD-ROM,Hard Disk,Floppy). On the Welcome to Setup screen, press ENTER to set up Windows XP.
2. Press F8 to agree to the license agreement.
3. Use the ARROW keys to select the Windows XP installation that you want to repair, and then press R.

Windows XP Setup repairs the installation files, Windows XP automatically restarts, and then the Setup program finishes the repair of your Windows XP installation.
4. Follow the remaining steps to set up Windows.

 

Thanks for helping.
I tried to boot from the cdrom, and I get and error n°4. See the screen I get.

 

If you give me a translation of this message-it will be very helpful for me
Also try to create iso image of your Windows, then use this image for repairing.

 

the message means :
the file xxxx could not be loaded
the error code is 4
the installation program cannot go on
hit any key to quit

 

to create an iso image of windows : do you mean with mac osx, disk utility ?

 

To create iso image:
1.Launch "Finder"-"Application"-"Utilities"-"Disk Utility"
2.Incert Windows CD into Mac CD/DVD drive
3. Select that CD from the Disk Utility device list.
4.Press "New Image" on the top of the window
5.Choose name and location for the image
6.Set "Image Format" to "read-only"
7.Press "Save" button and wait for the image creation process to finish.
8.Locate created image, open it's pop-up menu and select "Get Info" option.
9.Expand "Name & Extension" section and change file's extension from ".dmg" to ".iso"

Now you should be able to connect this image to the Parallels Desktop Virtual Machine as virtual CD/DVD

 

It seems to have worked fine, and I could reactivate XP at the end.
Thank you very much for your help.
Jim