I have pinnacle studio 12 and i am having problems with putting the files onto a DVD.?

i have a 24x Slim CDRW/DVD and i am using Sony DVD-RW 120min/4.7GB dvds to record onto and it wont work, can you tell me what the problem is and if it is the cds can you tell me a CD that i can record the files onto. Thnx if you need more info Send me an email at Pikachew411@yahoo.com