ATtiny26 Geiger counter schematic and code

Hello to everybody, very nice and clever project.
I have a problem with the AVR code. I can’t compile the AVR code with AVR Studio and WINAVR (I’m newbie in AVR programming and I’m sure that I’m doing something wrong). I need the .hex file to burn into the microcontroller.
Any help would be acceptable.

Thank you in advance,

Dimitris