[ubuntu] Login Screen still shows after login.

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http://ubuntuforums.org – Hi All Login Screen still shows after login.Upgraded from 12.10 32Bit to 13.04 32Bit.I am able to use Unity & and other applications, but the login screen won't go away. I tried to change the wallpaper.Previously on 12.10, I had muliple Desktop environments, such as GnomeFallack, Gnome, KDE, XMBC Installed. I believed i have remove them before upgrading to 13.04.Surprisingly I have a work Gnome DE on 13.04. During installation it prompted me - If I want to replace some configuration files & I did, thought it would be better. I think my LDM is messed up. Any suggestions welcomed. Pic UR (Hardware)