Nero 5.5.7.10b looses my DVD+R burner

I have an HP 300i DVD burner. I tried the software that came with it but it was terrible. I reloaded Nero 5.5.7.10b and it found my HP burner fine, but after a few uses it no longer finds the DVD burner. I’ve reloaded the software, used Nero tools (it’s listed there…) all with no luck. What’s wrong?

I don’t want to buy any more software, but I keep reading about RecordNow, is it better? how much and where?

Thanks,
Matt

Update: Just tried it again and it found the Hp DVD drive! I have no idea why. Should I expect Nero to loose my drive again?