[mamorunl]

pawn Код:

if(!skinid) {
                ShowPlayerDialog(playerid, 3497, DIALOG_STYLE_INPUT, "Free starter skin", "Please input the Skin ID you wish to use", "Select", "");
            }

iirc, the !skinid is to check if skin is false.. however.. 0 is false as well...

Not sure if you also checked with other skin ids but if you changed something then please tell us what you changed.

Also a step by step instruction on what you are doing and what is happening and should be happening is always good practice to submit stuff like this