[Sh4d0w2]

You should put your register dialog under

PHP код:

public OnPlayerConnect 


and set random skin under

PHP код:

public OnPlayerSpawn 


To make random skin at spawn follow this tutorial : [TUT] Random Skins
But for me,I would do like this for random skins

PHP код:

public OnPlayerSpawn(playerid)
{
    new rand=random(299);
    SetPlayerSkin(playerid, rand);
    return 1;
}