thanks for your help cprmac..
i could see the firm update option and did that.. also enable RAW for testing. However, how do i now go to record/normal mode to be able to take pics? if i swithc off/on cam, i come ut of CHDK and have ot again do firm update. if i directly press shutter button, while in playback, it starts running a script..
can u help pls? thanks in advance