check your board user manual to see what dormantreign suggest you about the switch .
I tried 3 different techniques to solve my problem.
1> change the battery. (which does not work)
2> installed the BIOS update from intel's website for the model no-GZ946. (which does not work as well)
3> there are 3 pins on BIOS, i remove the jumper from the first 2 pins and put on the last 2 pins then i supply the power to my pc and after few seconds a message displays to put ur jumper to its earlier place then i switch off the power and put the jumper its right place but the after doing all the 3 things my pc still showing the message "CMOS ERROR", "CMOS CHECK SUM ERROR"
is there any thing missing in my problem solving procedure??