Java Programming

I have Java program which runs on PCs and saves files with a special extension. When I double click on a saved file, I would like it to open with my program. This worked before when my program was stored on the C drive. But now I store it more appropriately in the Program Files folder, and it does not work anymore.

If I try to say Open With and browse to my program, it does not show up in the list, so I cannot choose it. Or if I go to Default Programs in the Start menu, click on Associate a file type or protocol with a specific program, select my extension, click on Change program, and browse to my program, again it does not show up in the list, so I still cannot choose it.

I am using Windows Vista, and I am able to make associations with other programs, but not with my program.

How can I make it work? Thanks for your time!