i replaced it but not working
If you have a voltmeter, test the battery you have already installed. It should read around 3 volts.. if it's substantially lower than 3 volts, it may not work. If you have any doubts, buy another new CR2032 battery and make sure it's in closed packaging... but even so, some new BIOS batteries sold are already outdated and discharged, so test it's state of charge before installing it on the motherboard.
Also check the BIOS jumper setting. If the jumper is on the BIOS reset pins it would reset the clock on every computer startup. To know which two pins the jumper has to be on, go to the motherboard manufacturer website and download a PDF manual that should indicate which two pins are for normal operation and which two pins are for resetting the BIOS.