slipknotpsycho- the one i have is the second link that you have up there

nochowder- i'd totally recalibrate it, except im not really sure as to how to do that. it ahs like three buttons, if i hold down the cal/mode one, it changes to CAL, and then it flashes, and then flashes 100.0.

so i did that as i was typing your response, and then it said fail. i've never left it on that long, and since it says 100.0 and not 1, i think im gonna go hunt down 100 nickels. and then we'll see how things go. : )

PS EVERYONE thank you for your replies!