Connection Issue

Problems self explanitory...I had downloaded the first the enders and latikai clients. Ender loads the start up screen but when attempting to login do i recieve a Connection: refuse connect error. Latikai's client does not open. The web browser version found on this site also does nothing. Ive ensured the programs unblocked checked through security settings on java. Then proceeded to uninstall and reinstall java 7.40...changed the security settings to medium and still nothing loading from this sites client. Im not sure what else to try. Im runing windows vista...within my running programs javaws starts but does nothing.