Crashing Problem

Put the summary of the bug you're having here

What I expected to happen was that I should be able to play in my servers but i dosent let me go in any servers!

What actually happened was it kept on crashing me when i went in a server in minecraft 1.7.10
(in the top it says 1.8 but it really 1.7. It didn't let me put 1.7.10)

Steps to Reproduce:
1. I changed my version to 1.7.10
2. I went on a server
3. It crashed my game!!