Burning dvd+R issues on plextor. please help!

i’m currently using a plextor px708a dvdrw drive and my problem is that whatever brand media and software i use to burn DVD+R discs, they never play on my dvd player, but play fine on pc. However my friends hp dvd writer burns dvd+R discs and they play fine on my dvd player. what could be wrong? can anyone help me please!