Nokia 6820b Unlock - Code Error

[tekguy123]

Hi Guys, I have tried all the codes that the generator has provided, even did searches online for similar issues and am stuck. I cant seem to unlock my Nokia 6820b IMEI:352968001595018...ATT-USA.
If anyone can assist me to let me know what the heck I am doing wrong that would be great.:-?

[zimunchino]

maybe its caused because of that you tried over 5 times !!??!!:-?