I am trying to register my SDS200 on myUniden.com. While I have registered scanners there before, I am having issues in this case. I have the SN from the label and I have the ESN + SUM from the menu. I have added the SN as it appears on the label (with Z replacing 260). But I am having issues populating the fields on the right side. Whereas the SN field took 12 characters, the ESN field on the right side will only accept 11 characters. Why is that, and therefore how am I supposed to enter the ESN correctly? I can enter only 11 characters of the ESN but it doesn't like that of course. I have confirmed there are no spaces in the field keeping me from entering more characters. As for the SN, ESN and SUM, I have triple checked all numbers on the label and menu and I have them correct. I hate having little issues like this, but have not been able to work around it, so any advice would be welcome. Thanks all.