i tried to start minecraft then it started downloading the files then it says error i tried to many versions

Put the summary of the bug you're having here

What I expected to happen was...:
i expected to run minecraft and download the vesion files then play

What actually happened was...:
after the files finish from downloading an error message popup

Steps to Reproduce:
1. clicked on minecraft
2. pressed play button
3. the verison files started to download
4. after that an error message popup
5. i pressed report to mojang

• i used to play minecraft since 1.2.1 i have 2 minecraft accounts "one you guys deleted it and this is the other one " *