its quite possibly the disk itself, dvd players are finicky about what disks they get fed, skipping and freezing usually means its having problems reading the disk
Im not sure how sensitive they are about cd's used as vcd's but with dvd's they often have problems with generic brand disks or bad quality disks, Ive had this happen before. Sometimes just burning them at a really slow speed will help, but not always. Best thing is using good disks, what brand did you use?
