cannot get past login screen in lubuntu 12.04

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http://askubuntu.com – I have lubuntu 12.04, and it was working fine until I installed something and I do not remember exactly what I installed because I was trying to build a ruby gem and it required a lot. now I rebooted and I cannot log in, well, I can but when I do LXDE apparently cannot continue and returns to the login screen. I created another user from my console screen (I can login there), and the other user can login. So I removed my .* directories from my home directory, but it did not help. Any suggestions? (HowTos)