Can Not Burn A CD From A DVD

I was running low on DVD-R's so we went to Sam's on the way to church this evening. I picked up a case of CD-R's by mistake. At the close of services I finalized the master DVD and ran to the duplicators to make 60 DVD's before the crowd came out. I pushed the "Copy" button and about half of the drawers opened up and the error said I could not copy DVD to CD. I panicked. All I could do was start printing labels on some more DVD's. Thank the Lord the crowd came out slowly tonight and I was able to keep up giving away the DVD's. Seems like every night some little something goes astray at the last minute and my stress level goes sky high. I'm sure the Lord is trying to teach me something in all this. Well, Praise the Lord, I still enjoy what we are doing for Him.