DVD's don't play after installing of Media Player 10 FIN

Hi and asking for your help again

I have Windows XP Home Edition version 2002 Service Pack 2, LG GCC-4480B
combo drive and CyberLink PowerDVD 4.0 decoder. After updating to Media
Player 10 FIN DVD's don't play anymore. Trying to launch DVD's from Media
Player or PowerDVD I get message "put disc to disc drive E". I tried the very
same DVD in my lap top and it played normally. I also tried to compare the
settings, but there is no diffrences (except the combo drive is a Matshita).
I updated the combo drivers and PowerDVD's drivers from their websites. I
even unistalled and installed again the combo driver, but nothing seems to
help.

Does anyone have answers? I don't think it is a hardware problem, because
all audio CD's and CD-ROM's work nicely on the same combo drive.

Esa
.