I see this issue when ssh is disabled on the WLC. You get the prompt for the username and then when you enter the username, the window goes away. I see this when using putty.
What version on the WLC are you using... I don't know of a 7.0.103.0? There is a 7.2.103.0 and the latest 7.0 is 7.0.235.0.
-Scott
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