Problem when uploading a simple coding

When verifying a simple code,the Arduino Software is able to verify it. However, when I tried to upload the code, it displayed "avrdude: verification error, first mismatch at byte 0x0002
0x6c != 0x61
avrdude: verification error; content mismatch

Can someone help me?I do not know what is the problem to this. Thanks!

Please supply your code in its own window as seen in other posts. This can be done by placing     [code] and [/code]  around the code. This makes it easier for others to read.