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Atmega - Programming Flash .. FAILED!

Hi, when I want put program in to Atmega644 it shows: Erasing device .. FAILED! , but when i click on "Read Signature" everything is OK. I am using programmer compatible with STK500 and AVR studio. Help please.

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Sorry It is not "erasing device failed", but "programming flash failed" after that is "erasing failed". I tried programming at 3.1V and everything OK. At 5V error but at 3.1V OK, I do not understand . ti is two board first with processos and second with LCD and ISP.

When I click on Verify it shows: