Convertxtodvd error message

hi everyone new to this site ive got a question if anyone can answer it for me
i am currently using convertxtodvd and have done so for approx 7months with no problems but i have gone in to burn existing dvd and i get error message no memory. although this is the only film in my file and i have used this option before.any ideas how to clear this thanks nikki.

What is the path file to the file you want to burn? Make sure it is complete.
(something like C:\Documents and Settings\Claire\Mes documents\ConvertXtoDVD\file name)