se c905a AT&T Can not use A2uploader because cid 53

i got C905a AT&T. i cant use a2uploader to replace cda file.
it got a message like this when i using a2uploader:

ChipID:E800,EMP protocol:0401

PHONE STATE: "RETAIL"
FLASH CID: 0053
Elapsed:5 secs.

Thanks!!!

Use the latest a2 uploader v5....that will work for CID 53

can u give me the link???
i did download some but it did not work!!!
it said that was a virus and i could not run it

There's no virus; disable temporarily your antivirus and download again.