hello, i am very new to duplicating dvds, and im wondering if i can get some advice. every time im trying to copy to a blank dvd it always says there is not enough room on my target source. but the movie itself is only 97 min and the blank dvd can hold 2 hrs and this keeps happening. as soon as i put the blank dvd in it says to use at my on risk. and when i click on ok the disc pops out and says illegal operation. can someone tell me what to do, thanks