Conditional fields not working

For from width you need to increase the width of the form and it will make 2 or 3 column layout show.

Thanks

Can you please provide step by step instructions on what you did for conditional logic and include a screenshot.

Thank you very much for your quick answer.
Ok for the width form.
For conditionnal fields.
Here is my form : https://test.termel.fr/wp-content/uploads/sites/4/2015/06/Capture-d’écran-2015-06-10-à-11.33.27.png

The dropdown field on which other items have conditions : https://test.termel.fr/wp-content/uploads/sites/4/2015/06/Capture-d’écran-2015-06-10-à-11.33.58.png

An item with condition on previous field : https://test.termel.fr/wp-content/uploads/sites/4/2015/06/Capture-d’écran-2015-06-10-à-11.34.16.png

But the field never shows up in front end nor in preview : https://test.termel.fr/wp-content/uploads/sites/4/2015/06/Capture-d’écran-2015-06-10-à-11.35.18.png

Any clue ?
Thanks

For form width, your mean i should set a width with CSS ?

No there is an option in plugin to increase width of form.

Go to settings > appearance > registration form and chance registration form max width option.

Thanks ??