Dear, serdar ozcan

There are several reasons for your board develops noise (Emi) in your case noise? When ever you move your hand. Your body is acting like coupling path.
First you have to find out the source of the noise.
For more details you can download some of the app notes from National Semiconductor
App Note 1050 Understanding and Eliminating EMI in Microcontroller Applications
http://www.national.com/an/AN/AN-1050.pdf
App Note EMI/RFI Board Design
http://www.national.com/an/AN/AN-643.pdf
From Intel
EMI Design Techniques for Microcontrollers in Automotive Applications
http://developer.intel.com/design/au...272673.htm

If you can provide your schematic drawing & details of program I think I can help you out.

P.Ashok Kumar