bug the connection / laucher

Put the summary of the bug you're having here

What I expected to happen was...:
begin to play and have fun

What actually happened was...:
but wrote me: Sorry, we aim couldn't connect to our servers. Please make sour That you are online and That Minecraft is not Blocked. (IOException: Invalid keystore format)

Steps to Reproduce:
1. I connect and ca me wrote this
2. ...
3. ...

sorry i'm french , My Account minecraft work on my laptop but me but on my pc fix, I'm excited because it does not market: '(