Can't copy on DVD+R, Only works on DVD-RW

Can’t seem to be able to copy any movie to a DVD+R, but always works on a DVD-RW. I get the “successful” message at the end and all, but players wont read it, not even WinDVD… Any suggestions!

use DVD-R because the source is too big for DVD+R!

May be you get a clue

DVD-R, DVD-RW and DVD-RAM These formats are supported by Panasonic, Toshiba, Apple Computer, Hitachi, NEC, Pioneer, Samsung and Sharp. These formats are also supported by the DVD Forum

DVD+R and DVD+RW formats are supported by Philips, Sony, Hewlett-Packard, Dell, Ricoh, Yamaha and others.