problem connecting laptop to monitor

Hi,

I have a problem with my laptop.

I gotta laptop Sony Vio, and when I connect it

to TV monitor or to computer LCD screen, I see

the picture of my laptop, and everything is working,

but if I open a DVD movie with WinDVD program, it runs

in the laptop, but not in the screen.

what is the problem ?

thanks anyway.

theres usually a key combo that tells the laptop to display through the vga port...
on my TOSHIBA, its FN+F5....
its probably different on ur vaio though... try looking through the function keys on the top (F1, F2, F3, ETC.) for one with a picture of your laptop and a rectangle