Ok when i try to burn one of my dvd's on my HP DVD Writer 400c and asks me to insert disk. I put in a DVD-R and it wont recognize it, acts like nothing is there. However if i put in a DVD+R it works just fine and burns with no errors. I just went out and bought 100 DVD-R's and i would really like to use them b/c i like them better. I dont know what kind of a log to run to show u some stats of my system, but i searched Google for my problem and i found this forum

http://forums.afterdawn.com/thread_view.cfm/103822

This shows a similar error, and how to fix it. I went through the steps of uninstalling the primary and secondary IDE controllers, but no luck.
I was hoping to get some input from you guys, i appreciate any information you can give.