The pledge doesn't work on the fundraising plugin

I made the installations and configure a first fundraising project. Everything look ok but when I try to make a donation to test how it works, it does non do anything. I choose the amount, pun my name and email but then it jumps to the page where is again asking me how much i wan to donate.

The Tanks message doest't show and I don't receive any mail or the pay is show on the pledge list.