DVD+R recorded on Samsung DVD/VCR won't play in Windows XP

Hello. I hope someone can help.

I have recorded a number of TV shows onto a TDK DVD+R using my Samsung VR330 DVD/VCR recorder. I did NOT finalise the disc, but it plays back correctly. When I insert the disc into my computer (LG H10A, Windows XP) it cannot read it at all. I then took it back to the Samsung and finalised it. Now the Samsung cannot read it and it still doesn’t work on the computer! Talk about frustrating. Any ideas, hints, etc.?