bbPress forum appearance

Hi, I am setting up a bbPress forum to my family blog. I have created a new page with [bbp-forum-index] and it works great. I just have a problem with the appearence. Currently, I have https://drive.google.com/open?id=0B2MIeBbGp2FQUk9nRWpISGxLRDg I have tried to select "no lateral bar" in responsive options of the page but with no effect. I have tried to install bbPress-New UI plugin and then, I have the following result: https://drive.google.com/open?id=0B2MIeBbGp2FQLXVNOWJKMVRVbGs Can you help? Thanks in advance