It won't let me on a server and i have everything right

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
Go on my friends server
What actually happened was...:
Describe what happened here
My game crashed and I don't know why
Steps to Reproduce:
1. Go on Minecraft 1.7.9
2. Go to Multiplayer then Direct Connect
3. Type in any server then click Connect