Thanks Kundan for your suggestion and sorry for late posting. I was thinking this post is dead now.

Anyway...

While trying to boot the Server side I don't get any error message. It is totally blank, (no cursor sign of short arrow as well). So there is no way to go to Service Console or anything in Server side.

This computer makes fan sound since long time and I am used to it.

In XP side : Computer Management > Storage > Disk Defragmenter. I can see the Win 2003 Server side's volume and other information. Other than this I can not do anything.

How to "change the boot sequence on boot.ini file and make windows server 2003 first boot option" as you have suggested?
 
Thanks again...