You are supplying an invalid password. Please go to your server account on the C&C:Online web site (log in with your credentials from here) and check your server password.
thank you so much!! i didnt know you need to enter the server password.... u have another question can i play rank in this cause it wont give me
if you try to search for ranked game you wont find any thing, that will try to find the old gamespy servers wich is no more.
but you can play normal online from custom match, that system will keep track of Your ranked score. http://shatabrick.com/
so just play custom games and it will keep track there