OK, first of all, it looks like your language file is either corrupted or belong to the previous version of MF Pro, otherwise you wouldn't have these "NO MESSAGE" labels in the form. Please uninstall MF Pro, delete the installation folder (C:\Program Files (x86)\MarketFeeder Pro 8\ and reinstall it anew to make sure the new language file is there.
Then, you need to increase the base price which is equal to 1.1 in your screenshot, where it says NO MESSAGE 2213. It is probably too low, you will need to increase it so that BetFair does not reject your small bets.