Have checked,as far as possible, for a solution to this:

Have connected to wireless on lubuntu, when started,worked as it should, now every few minutes get the b...........y box up telling me need authentication.
Know I'm a bit of an idiot,but would not have been able to connect in first place if did not enter key.
Click the box and all works well for a couple of minutes, then up comes the box agai, have checked the setting, and, would you believe the key has dropped out.
Some of the responses on the internet are to say the least idiotic, is there really no way to get rid of the b....y box?

HELP would be appreciated