Pan & Scan disabled playing VCD with PowerDvd

Is's strange but i cannot perform a Pan-Scan function with a standart VCD-Disc played on Power Dvd XP, but can do it with *.mpg files loaded from HD and *.DAT files too, loaded from VCD disc. Using the same P-dvd XP.

This is a some strange limitation on the VCD standart?

Thanks if some help,

Rod76

 

Thanks Dela for answer,
I'm only guess to perform some zoom on letterboxed VCD's runing on stand-alone players.
I must to seek people that have stand-alones to perform some tests like that.

Is cruel that living in Brazil i can't find much quality e-materials or good forums like this to discuss about tech info.
Well, God Bless The Internet!

Thanks one more time for attention, and sorry if my english is not too good.

Rod76