Well the Login server have been having problem so once ya got the part where you couldnt connect you were probably good to go, now the question is are you trying for 4.4 or 5.?

As for running a server, 4.4 or 5. if your not patched from Dec you CANT run a server right now, and the grant command....just search there isnt a single way to fix it, different things work for different people and all ways are explained in these forums. Would also need to know what OS are you running, which versoin are your trying for? What DB did you DL? Did you follow the walkthrough? If yes which walkthrough(s) did you follow. You asked a lot of questions but didnt give much info.