[Admins]

That's not the problem. When you want to pass variables to the clientside or display it as string then you need to convert it into a string or array first (which is then converted to a string automatically). Use oldplayers.savevarstoarray(false) for that, or eventually directly work with an array in this case, like olplayers.add({pl.account,pl.level,pl.x,pl.y});