Need help playing

well i havnt played private servers for maby almost a year now or even more... and it looks really cool how it has high detail and it looks like new runescape with bounty hunter and all that but im seriously confuzed... i downloaded moparscape today and eveytime i try playing one of these nice servers i login for half a second and log off, it doesnt show screen its just black and most of em dont even log in... what do i need to download to play?