DVD Player won't play -R ??

[rrtbusa]

My computer is a 4100 Dell dimensions,pent III 733,383memory,w 98se. I have a DVD player on it that i never had used much. When i just started getting into dvds, I found that it'll play DVD video(store boughts) & +R that i recorded on my stand alone, But it won't play the -R's , This is what i have all my DVDs on.. Is there something i can do like upgrade the DVD players software or something?? I'm very new to all this but trying to learn. I see there's ALOT of knowledge on this forum, thats why i'm here to ask questions & learn. Thanks for any help.

[glockjs]

try running dvdinfopro and see what it says

[rrtbusa]

Thanks, I'm really new with this, & would appreciate anymore comments, I'm VERY INTERESTED in solving this problem, & would like to install a NEC 3520a burner. I VERY interested to learn how to copy DVDs & start making copies. Thanks , I'm trying to pick up info, And thus far, This site "ROCKS" !!!!!!!!

[reboot]

Can your player even read -R's?
Did you run dvdinfopro to find out?
Buy a burner and let's make coasters!

[hech54]

OUCH....that sucks.