computer management-disk management problem

well its blowing my mind...
im not able to do any thing in computer management-disk management page
my account is an administrator but format, extend and delete volume optiones are grayed (disabled) even when i want to shrink a drive ( not the one with the Vista installed on) i recive an error saying you are not allowed and access is denied .
i dont understand whats the problem... can anyone of you folks help me?
there two pics attached below one is the error it self and the other one is the disk management snapshot.
thanks before answering

Hi farad4me

Windows is using this drive for page filing, DO NOT DELETE.

a theo boy!
i dont know what is page filing but ineed to make some unpartitioned space so that i can install an XP... disk management doesnt allow me to even shrink any of the drives... what do you sujjest?

Download Hiren's Boot CD. It has a partition resizer.