Drupal commerce auction - reverse auction

Hello
I want try reverse auction module.
I Enable the Reverse Auction module.
Next I Create a new content type (I named mine "Reverse Auction"). In this content type i have only Title, Path and body.
Next I go set to Reverse Auction config page and set "Reverse Auction" content type to the display content type (admin/commerce/auction/reverse_auction).
Now when I add a new Reverse auction on my site and view the "Place bid" bookmark then i have a message:
" You don't have any product variations... "
What am I to do?
I want to place reverse auction bids in "Place bid" bookmark without add new variations of product.
Please help me.