Laptop won't read dvd

I can load programs on dvd onto my laptop, but I can't load Microsoft
Autoroute 2007. My wife can load it onto her pc which runs with XP home
edition. I'm using Vista and although it reads other dvd programs it just
spins my autoroute dvd round in the drive but doesn't do anything else. It
sounds like it's trying to read it, but nothing happens, I've tried running
it from the 'run' in start menu, but this makes no difference.
Would be grateful if anyone can help in this matter.
Thanks.
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Logie