Problem with DivX to DVD conversion program

I am looking for help to install the DivX to DVD conversion program. I bought the program and when I installed it , I received this error message;

  " Access violation at address 762DBD8A in module 'comdlg32.dll'.
     Read of address 00000000."

I am running WinXp 64 Pro with an AMD Athlon 64X2 dual core processor. When I downloaded it to “try” there were no problems at all and it functioned so well that I decided that I would buy it. Now I cannot get any response at all even after uninstalling and reinstalling, the same message pops up. Has anyone any ideas.

Thanks

roxio 7.5 does an excellent job at divx to DVD conversion