PROBLEM INSTALING OS ON NEW SYSTEM

Here is my setup:
-Nvidia Geforce 6100 motherboard
-AMD 64 processor
-ATI 512 MB Video card
-500 W power supply
-Used 80 GB IDE Western Digital HD – Approx. 5 years old
-Used IDE CD/DVD Drive – Approx. 5 years old

Problem:
Sometimes message is:”DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER.” when XP install disk is in.