Trying to register a HD500 but keep getting error message 523
I have looked at the forums and it appears its a problem typing in the serial number ,mistaking zeros for the letter O
As my serial number has numerous O or 0 i have tried every permutation possible and still no joy
I have also tried to register using my smart phone over 3G connection ,i then get error 525
Couple of things
Dont type in the Parenthesis - i.e. the ( and ) !
Second, there is an FAQ that may or may not help you http://line6.com/support/docs/DOC-1488 Come back if not.