Do you have an ebay store? If yes, you need to update your store categories with ebays. Go to your account on Auctiva and go to "update store categories from ebay". Everytime you add a new category to your ebay store, you'll have to "update" them with Auctiva. I hope I have understood your question.
I opened a case with Auctiva. Their first engineer, just took guesses at the issue.
Their 2nd engineer clearly explained that you must log out, and relog in, in order for that button to become active a 2nd time. It's only active once per session.
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