One of the really useful features of Auctiva is the Events register at the top of the listings page. If your item listed successfully, there will be a green number. if there's a red number, something stopped the listing.
Click on the red number, and you'll see what the problem was - then you can edit your listing and post again.
Do persevere - I've found this site so much quicker and easier than turbolister - once I'd got all the profiles set up.
If you wanted to chat about this, you can reach me at Jogastonparry@hotmail.com.