Ichat not connecting "specified host name is not valid"

i have been getting the above message when i try to connect to ichat since about mid december. after trying up to 10 times it usually at the end connects fine (without me changing anything).
does anyone have an idea what might be going on ?
thanks !
pia

oh boy.
afraid we need something bigger than a stick..
changed to login.glogin.messaging.com but then got no connection at all("connection timed out"). deleting com.apple.ichat.AIM.plist unfortunately did not help either.
have now gone back to login.oscar.aol.com and managed to log in with the 3rd try...
yesterday by the way my ichat connected with the 1st try - i already thought there would have been something weird at the aim server end, which they finally would have solved. but no such luck..
bugger !
pia

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