404-error message when backing a projekt

Hi support,

I installed the fundraising-plugin,

set up payment settings (manual and paypal)

set up a fundraiser

set up a widget “fundraiser panel” on my website, showing a specific fundraiser.

It shows on my website in the footer, OK, but says that no payment gateways had been enabled (I did, though).

http://www.sost.at/dev/

And I get an 404-error-message after pressing the “back-this-projekt”-button, having entered an amount.

Id would show the page:

http://www.sost.at/dev/fundraisers/nochmal-projekt-haus-sonnleitenpledge/

Any Ideas what’s wrong?

Thanks a lot! Thomas