regztfen, I'm assuming you're using Windows XP. Go to the link below and scroll down to line 314 (left column) and click on "File Associations are Greyed Out" tto download a reg file fix. Save the REG File to your hard disk. Double click it and answer yes to the import prompt. It may correct your problem.
Note: If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem.
When I right click on a file and go to properties and go to "opens with" and click "change": The option box at the bottom that states: "Always use the selected program to open this kind of file" - is faded out and cannot be unchecked. How do you change this so this option is available?