having trouble loggin on some1 help?

something wrong with my java, first i tried logging on and it says no response from server try a different world. So i used a vpn and changed my ip and it still doesnt work. it says eroor connecting to server. so i tried fixing java and i looked at my java console and it said "Missing Permissions manifest attribute in main jar: https://dl.dropboxusercontent.com/u/2058...client.jar"
so i tried rebooting my computer and it still doesnt work. someone help pls.