unmounting image crashes XP system

I bought True Image Home 11 a few years ago but after looking at the manual I was intimidated and didn't install it. I recently bought a nice WD external USB hard drive so now I want to put it to use for backups. It comes with a lightweight program, Smardrive, but all it can do is back up documents- which it will do continuously, a nice feature, but not good enough- so I'm back to my TI.

So, rather than install it on my main computer- a 2 year old Dell running Vista- I installed it on my backup computer running XP. I made a few backups and experimented with restore files- all went well.

I created an image of the C drive on my backup computer which is networked to my main computer. The external USB drive is connected to my main computer- so it was a good test- creating an image of the backup computer which went over the network to the external drive on the main computer. Nice!

Then I experimented with mounting that image. It mounted fine, I could see files. But, when I chose to unmount it from within the TI program, it crashed the computer. I tried this twice with the same result. I also tried unmounting it by using Windows Explorer, finding the mounted image's drive letter- right clicking and chose to unmount it- and it unmounted successfully.

Now, this is an old version of the program so perhaps there's a known bug causing the crash? I haven't bothered to download an updated version- because I haven't yet registered the program. My objective is just experiment with it on the old computer, then when I feel confident, I'll uninstall it, then reinstall the program on my main computer, then register it, then looked for an updated version.
Joe