I have the Ph 3350 dual media

My problem is that after recording home movies and some tv prog on a PH dvd+rw disc , the disc will not play on my Panasonic Sc-mt1 , although Friends who have the PH recorder their discs will play on it ! So what am i doing wrong , the discs will play on my other dvd players but not the Panasonic , please help


Are the discs that do play also RW discs or are they R? Most likely the Panasonic cannot read discs which are not finalised/closed.