Wlan Connection Issue
 

I have the following issue: I often get an exclamation point inside the normal green dot indicating Availability WLan connectivity. It says "Unable to connect to one or more accounts". When this happens, I have limited connectivity, ie I can send Skype messages, but if I try to open a web page it fails. Disconnecting and re-connecting never gives me full access, but re-booting the N900 will 1 out of 4 times or so. Is this some router port issue? If so, why is it intermittent? Any insights appreciated!