Not to ask an assholishly basic question, but did you set everything up in the other sites portion of account settings? There are times when crossposting takes a while or fails (usually b/c of something that's going on with LJ), but if you've got your other account set up & you check the tickybox, I can't think of any reason it wouldn't work.
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(no subject)
Date: 2012-01-01 05:00 pm (UTC)