Need a little more info.
What action are you taking to open it? Try every option possible: Double-click the desktop icon (if you created one), run from the start menu, double-click the EXE in Windows Explorer, use the Run command and browse to the EXE (this would have the same result as previous suggestion, but worth a shot).
Exactly what does happen when you try to run it? I assume there’s no error message? Do you get Windows’ “timer” icon (hourglass in some versions, rotating circle in others) and then nothing?
After you attempt to run it and it doesn’t start, press Ctl+Alt+Del and open the Task Manager: Is DVD Architect listed in the Applications? Is the executable (dvdarchitectstudio.exe or similar) listed on the Processes tab? Sometimes a program is “running,” but with a problem so that it doesn’t actually open. If this is the case, select it in the list and hit the End Process button. Then try running DVD Architect Studio again.
Last but not least, are you running the most current build of DVD Architect Studio? Check sonycreativesofare.com for the most current one.
Rob