Failed to upload sketch

Hello, I have a problem with an arduino mega I just bought, the install using windows 7, but when I upload a sketch sent me the following error:

Binary sketch size: 1602 bytes (of a 258048 byte maximum)
avrdude: stk500v2_command(): unknown status 0xc8
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.

avrdude: stk500v2_command(): unknown status 0x01
avrdude: stk500v2_disable(): failed to leave programming mode

The power LED is green and the "L" in orange static
And select the appropriate port, the AVRISP mkII programmer is.

The first sketch upload it was the "blink", then try another using SPI and also worked, but when I went back to connect sent me the aforementioned error.

I would appreciate your help.