Gravity Error

[DragonFly74]

/?;ok i know i may seem like a newb, but i have several RO folders with different servers on them. i have a Main Ro folder i copy and put a new server into it. right now i Dled all the stuff i need and when i try to play i get a black screen and then a Gravity Error. i tried looking for a solution in the forums and such but i can't seem to find one that fits my current problem. i have had no problems with the other servers under the copied Main Ro file i have but it is starting to get to me that i see a cool new server to play on and i can't get in to play, it makes me sad, i want in to play and have fun. can anybody help me please????