Hello, I just upgraded my motherboard, processor, and RAM. I have installed win-xp, but i have a few issues booting up and shutting down.

My setup is:
Quantum Fireball 60gig HD
Radeon 9600pro 128 mb 8xAGP
AMD Athlon "barton" 2600+
Corsair XMS c2 pc3200 (256mb)
ASUS A7N8X-SE/SV motherboard
420 Watt PSU
1 DVD-rom drive and a CD-R drive
Soundblaster Live!
floppy

Issues booting up:
1. When i boot up, sometimes I hear no beep, and nothing happens, my monitor doesnt even get a signal. But then again, sometimes I do boot up just fine and load windows XP pro without any problems.I think it may be AGP related? This is weirding me out! any suggestions?
Problems Shutting down=
1. Ok this issue seems to be related to my booting up problem. When I go to shut down or re-start windows XP, it sometimes will get stuck on the Shutting down windows screen and do absolutely nothing, which forces me to manually restart or turn off the computer. Now when i manually turn off the computer, I run into the booting up problem more often, and sometimes it always happens. I get no "post beep"? and no signal is sent to the monitor.
What can I do to fix these problems. They dont seemt to be major, not like i fried something.
I am really confused about what is going on and have been trying to work it out for the past couple of hours.

I dont know what to do-which is why i'm here-and really need some suggestions! thanks!!

Well. Your BIOS is what actually boots up your computer.
I would try clearing the CMOS settings and then try to reboot.
Have you done that?
Refer to your Motherboard manual for instructions on clear the CMOS.

I have done that yes. I still get the same issues every so often. =( Any other thoughts?

Make sure your processor is secure,
Make sure the heat sink on the processor is sitting squarely on your processor, ie: No Gaps,
Did you use thermal paste?
How much did you use?
About the size of a grain of rice is sufficient.
Try a different stick of RAM,
Try a different power supply,
Make sure nothing is grounding out.
All of the motherboard standoffs are in the proper place.
None of them are hidden under the motherboard that you don't know about?
Try disconnecting everything from the motherboard, except for the Power supply, RAM, Processor, video card.
Now boot up.
Does it POST?
If yes.
Then add your drives back one at the time (with the power off and unplugged), until the problem start again.
That will be your bad hardware.
You will need to replace that item.

Good Luck.

pc3200

There it is i'll bet.

Try some slower memory or at least make sure it meets the ridgid Asus specs for PC3200

Jimi_l