server login issues on 1.7.4 & 1.7.5

Hi. I have experienced a login failure when ever logging into one of my server that I play on (play.kudoscraft.com) and I'm really mad because no matter how hard I try the game crashes without a trace and its making me mad because I paid money to play and I would like to be able to play again. if you read this thanks so much. Jonah d. aka PackOBears....... if any sugestions please right bach