Renew Ad with credits Although credits are disabeld

Although I have uncheck "Enable credits for publishing an ad" on settings payment tab (means disable)
and have checked "Free Listings (logged users can create listings for free)" on settings payment types tab (means no payment)
When user click "Renew Ad" button (End ads tab on My Classifieds page ) he gets select box with weeks and credits.
Credits are not supposed to be there. Aren't they?
How can I remove credits from there?

Twenty-Twelve theme | wp 3.5.1 | clasiffied version 2.3.2.3 | no other plugins but directory, completely new installation