Twitter refuses my jabber id.

First I always saw twitter@twitter.org offline in my IM client (meebo), although my messages I sent got through to twitter. I then decided to re-set the setting in twitter, but when I now add my jabber id (aaa.bbb-ccc@jabber.org) twitter tells me:
"Please enter a valid instant messenger address. is not a valid instant messenger address"
 
sad I’m frustrated
Inappropriate?
3 people have this problem
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