cant log in

i update my minecraft to 1.8.1 but i still cant log in what is wrong? i hope someone can help me bye

Does it gives an error somewhere?
And you can start beta 1.8.1, but can't connect to the server?

merp.mooo.com:25565

yup i can still go on to other servers just can cant get in to this one for some reason

You could try to just remove your entire .minecraft folder (back it up first), and redownload Minecraft to see if it works then.

And when you try to login to merp.mooo.com, what does the error say?

i did but it wont work

Try showing some screenshots of the steps you're taking to log on, might help us troubleshoot it.

how do u upload screenshots?

When you post a reply you get a set of buttons above where you type your message. One of them looks like this: . Click on it to get to where you can upload pics. Click the button that says Browse... then find the pic on your computer, then click Host it. After that the pic is uploaded and gives you the code needed to include it in the post.

This process automatically creates an account with servimg.com since that's where the pics are stored once uploaded.