dvd-rw probs

[aiwa28uk1]

hi
i have recorded some tv programmes that i had on video casette (vcr)
on to dvd-rw with my dvd vcr combi they all recorded and works in my dvd vcr combi but i want to record them to dvd-r so i can play them in my other dvd player but my pc wont even acknowledge the disks i have tried it in my sony and in my pioneer dvd writers but still nothing can any1 please help thanks.