avrdude: verification error; content mismatch

When I want to upload my program the console shows me an error message. My arduino card is BlueBird UNO SMD V3.1 ATMEGA328P AU 1410.
The error is :
avrdude: verification error, first mismatch at byte 0x0000
0x62 != 0x0c
avrdude: verification error; content mismatch
Can any one help me to solve this error please..?