PowerProduder wont recognise my blank DVD disk just shows '?' in the disk attributes????

Lets try refreshing your driver list.
Try this:
First uninstall power producer.

1. Open Registry Editor:
   
   • On Windows 2000 and XP: Choose Start > Run. Type regedit in the Open text box and click OK.
   • On Windows Vista: Choose Start. Type regedit in the Search text box, and press Enter.
2. In the left pane of Registry Editor, navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class and select the {4D36E965-E325-11CE-BFC1-08002BE10318} key, which appears as a folder.
3. Select File > Export (Windows XP and Vista)
   
4. In the Export Registry File dialog box, select Selected Branch under Export Range, name the file (for example, CDDVDkey.reg), and click Save to save the file to the Desktop.
5. In the right panel of the Registry Editor, select the LowerFilters line, and then choose Edit > Delete. Click Yes in the Confirm Key Delete dialog box.
6. Select the UpperFilters line, and then choose Edit > Delete. Click Yes in the Confirm Key Delete dialog box.
7. Close Registry Editor.
8. Open Device Manager:
   
   • On Windows 2000 and XP: Choose Start > Control Panel. Double-click the System icon, click on the Hardware Tab, then click on Device Manager.
   • On Windows Vista: Choose Start > Control Panel, double-click System, then click Device Manager in the Tasks pane.
9. Click on the plus symbol next to DVD/CD-ROM Drives.
10. For each DVD-ROM or CD-ROM drive listed, select the icon then choose Action > Uninstall.
11. Restart Windows.
12. Windows will automatically detect and reinstall your DVD-ROM or CD-ROM drives. You can verify that the drives are installed by viewing them in Device Manager (see step 9). If the drives are not present, open Device Manger and choose Actions > Scan For Hardware Changes.