genesiss, I don't have a happy answer for you. Your Writer is capable of writing DVD's, but not the same format, your writer writes DVD+RW - NOT DVD-R!
You're not the first person to make this assumption, search even this forum and you'll see people that have ordered the wrong media --> DVD-R for their DVD+RW writer..
Sorry, the media you need to record stuff on isn't cheap, between 3x and 5x more expensive than DVD-R blank media..
>>X<<
Now - the strange thing is HP (and Philips) promised in the past, even in ads, that firmware might be issued that would allow DVD-R capabilities, but this seems to have been quietly dropped.. some US consumers using this turnaround to get their money back, straight from HP....