SOLVED !!! Donation form take off the responsive

I have a problem with the donation form when I put this in a slider. All the things without the donation form are responsive, but when I put on the donation formular the page lose the resposive. Please look at this site: land36.gartenfreunde-braunschweig.de/pro...erstuetzung/ruhezone and go to the blue slider with "Mit einer Spende..."

The plugin "Joom Donation Form Plugin" ist activated.

With the Firebug tool I can't identify the error.

Hi Michael,
I don't see the Donation form on that link, can you please explain more details the problem?
Thanks
Dam

Sorry, the donation form is in a slider, please click on this site on the large blue slider with the title "Mit einer Spende...". See the picture what I mean.

I hope you understand me, my English isn't really good.

The donation form doesn't responsive. But when I deactivate the module-link in the article, the responsive design is back. With other modules, picture galleries, etc. the responsive design is okay.