i am launching minecraft 1.7.10 and joining a server and when it logs me in it crashes

Put the summary of the bug you're having here
it keeps crashing my game when i log onto a server (its actually 1.7.10 not 1.8)
What I expected to happen was...:
Describe what you thought should happen here
i thought i was gonna log into the server
What actually happened was...:
Describe what happened here
what actually happened was my game crashed right when i joined the server
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...well i start up minecraft 1.7.10
3. ...and then log onto this server play.itsjerryandharry.com and it crashes when you are going to the second logging in message