you must have at least one database tool, if you do
go there open the database , select the table "characters"
and then set access 100 for gm and 200 for admin
or when u ingame target the person u wana make gm and do //changelvl 100 or 200
or im never sure so i always do //chagelevel 100 or 200 and then //changelvl 100 or 200