NEED HELP CONNECTING TO SERVER

Hey blaster its me smile18 i just cant seem to connect to my server. My hamachi seems to be working fine it says ready but every contacts i see is in yellow colour..which means low signal..and i cant send msgs ...i really wanan play ro hehe so do u think u know whats the problem?? when i start blast ro it will say failed to connect to server pls help me asap thankz!