Preview window not working (solved)

As the subject suggests, my preview window does not work anymore.

I tried some computers with Windows 7 64 bit, and I always got the same result.

On machines with XP 32 bit, it works normally.

Can you help me please?

Ok, I solved this issue, maybe it can be useful to someone.

Tourweaver makes use of Flash Player plugin for Internet Explorer, which in my case was outdated, so I just upgraded to v.13.

What fooled me was that I had upgraded Flash plugin for Mozilla Firefox only (my default browser) and not for IE, so I think that was the problem.

So, be sure to upgrade Flash plugin on IE too, as well as on your default browser.

Too bad Flash plugin still crashes when trying to open links to external sites...