Vista 64 problem

[Ianr]

using Windows Vista 64 Ultimate I cannot open DTL.
I was originally given a warning that "this program is incompatible" would I like to check for fix's. After checking for fix's and finding none I now cannot open DTL.
I have reinstalled DTL and have the same problem.
Can someone help me ?

[Blazkowicz]

What version did you actually install?

[Ianr]

I loaded v 4.30.4

[Sway]

Try to install SPTD 1.60 (DuplexSecure - Downloads (http://www.duplexsecure.com/en/downloads))