After installing the new memory now i can get into the boot screen how ever the System shuts down immediately.
I saw CMOS Checksum Warning at the beginning.
Form the second image the version of the BIOS that's installed is
SGP4510H.86A.0125.2010.0121.1927
Also one last thing i forgot to mention: i am not using the front control panel wires to start and stop the computer. i am using PSU on/off switch.In fact the only things that are connected to the motherboard are:
1. 24-pin (2 X 12) ATX Connector
2. 4-pin (2 X 2) connector
3. 4-pin molex connector
4. Keyboard & Mouse
5. VGA Display Card
Thanks