Chassis intruded

Hello guys.
Before 2 days i have learn for first time about this popular and old problem after so many years having computer and repairing computers
I put back the jumpers as it says in manual,i reset cmos and it work!!!!
but unfortunately only in the 1st startup because if i restart the pc for 2nd time the warning appears AGAIN!! CHASSIS INTRUDED SYSTEM HALTED FATAL ERROR!!!
i have tried anything i found while i was googling
change ram slots,reset again and again and again,replace jumper,remove jumper everything!!!on the second boot the message appears!!! im starting freaking out soo much so i need your help if u have experienced the same problem!!!thank you very much
My rig is
Thermaltake Shark
Thermalatake 500W PSU
ASUS A8N32SLI DELUXE
2GB RAM KINGSTON DDR1 400MHZ
Asus 7600gt
etc...

Your bios should have a setting to disable the "chasis intrussion" message. Mine was in the hardware monitor section. Your post screen will tell which key to use to enter the bios. I use one of the "f" keys or the "del" key.

i try it but still not luck!!
i forgot to mention that sometimes if u touch the case,especially inside u feel electricity intence!!i try to hold the psu out of the case to ensure that is not psu problem and i was not feeling the electricity!!i check the mb but i cannot see anything wrong!!