Locked immediately after logon - unable to use teamviewer

Hi,

I have strange problem with my connection - when I'm logging with teamviewer I see windows login screeen, but after I ender my windows password  i'm getting lock out of my session back to windows login screeen, ( I can see my desktop for a second or two, but then back to windows login' screen.  Any suggestions how to fix this?

I'm on widnows 7