Temperature sensor not working correctly?

[Blondie :)]

Hey all, I have a 13" MacBook Pro. I was looking into information about TurboBoost in the processor, and ended up installing a program called temperature monitor by Marcel Bresink. While I was looking at information about my CPU cores, I noticed that the core 2 temperature sensor works for a few moments, and then stops working again. Can anyone tell me why this is? I have posted a picture below

http://i1131.photobucket.com/albums/m541/Mitch_Guzman/Screenshot2011-05-27at90820AM.png?t=1306512780

If anyone knows what's going on, feel free to give me a heads up.

thanks,
Mitch Guzman