my dvd/vcr machine won't open the dvd, help!

i have a sanyo dvd/vcr machine and was attempting to copy old family video's onto a dvd r . BUT at first the player said no disk, i tried to put it in my laptop to see what it made of it, the laptop could register that i had put the disk in so i tried putting it in the dvd/vcr machine again but now the dvd slot thing won't open. i have tried to turn the machine on and off also i have unplugged it and re-plugged it in but nothing i do helps. also i have tried to look in the hatch but i can't see anything jamming it. do you know what could be happening???? and how can it be fixed?????    please help.