When I entered my QuickTime Pro registration information, I saw an error dialog box stating that the registration information is not correct. Or, it appeared to work, but when I returned to the Registration sheet, the Basic version was still shown and no registration information appeared in the sheet.
The QuickTime Pro registration code is tied to the name you used when you obtained it. You must enter this name exactly as you used it; otherwise, the registration code will not be accepted. Also, double-check the registration code you entered; these codes are long and complex, so it is easy to make a mistake. The code and name are case-sensitive, so make sure you enter them exactly as shown in the information you receive from Apple.
When I attempt to view a QuickTime movie on the Web, I'm unable to do so and am forced to download the file to my Mac instead.
This happens if the QuickTime plug-in has been moved or damaged. To reinstall the plug-in, you need to update QuickTime. When the updater runs, it will reinstall the plug-in in the appropriate location and you will be able to use it with your Web browser. To update QuickTime, open the QuickTime Player application and select QuickTime Player, Update Existing Software. The appropriate files will be downloaded and installed on your Mac. Restart your Mac and you should be able to view QuickTime movies on the Web.