My laptop has an ati card also (igp 320m). I've come to the conclusion that I can't calibrate my monitor on it... (been trying to with spyder2express.)
They spyder2 website says that some ATI laptop cards drivers have a bug that don't allow settings to be written to the LUT (look up table).
Basically, I'll calibrate, and everything SAYS it goes fine, but I'll see NO CHANGE between calibrated and uncalibrated image (last step using spyder2 shows image you can flick back and forth between two states.) And when the loader starts at startup there is no change in display either.
ATI says its not their problem... that laptop driver updates are handled by computer manufacturer... but most manufacturers either don't, or very rarely, update their drivers. Compaq is of no help either (I don't think they have a clue.)
There are "unofficial" drivers and tools from driverheaven.net to let you use regular drivers... I tried those and they left a warm cast on my screen (grays appeared dark reddish brown) and also made dvd playback and video overlay not work.
Hopefully you're not having any of these problems, but just wanted to make you aware of the possibility. (I know I'm never buying a laptop with an ATI/AMD card again, maybe not even a compaq, after all this.)
Otherwise, as DAMO said, there's no reason to touch the color tab after you've calibrated, so just try not to. Color-management tab should be ok to touch.
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