hi im a newbie but i have this major problem.

im using nero 5.5.4.0 and i burned a vcd (about one min). i was using a memorex 700mb 80 min (blueish colored disk)
i used tmpge to put it into vcd format according to the directions to the board. it came out fine.

i have a gpx dvd3000 and everything came out fine and i was happy. but now im trying to do about 50 mins of a two part video and im doing everything the same way i did it before and i get a no disk error. why is this? i tried to use another disk but to no avail. any help would be great.thanks