I installed bootstrap 3 with CS6.When I insert a container and open the bootstrap grid there is no content in the floater. I only read 'Open a page using Bootstrap'.This problem appears in new pages. In a previously made page the floater don't show this problem. What could be the reason?

Hello Walter,
How exactly do you "insert a container" when the panel shows "Open a page using Bootstrap"??

I add Bootstrap 3 to my new page.
Then I add container with Bootstrap Scaffolding: class="container-fluid" - class="row-fluid"- class="span12".
I select Bootstrap3 Options - Local Minified and add my Theme Css file.
I call Window - Bootstrap Grid
I select the cell in the container
In the Bootstrap Grid only stays the text: Open a page using Bootstrap.

I tried many ways with adding new row and adding cell to the right.
I tried with Converting to Bootstrap 3.
The Bootstrap 3 Grid stays the same.

It seems you are mixing the two extensions - Bootstrap 2 and Bootstrap 3. Of course when you add a container using the version 2 of Bootstrap nothing will show in the Bootstrap 3 Grid panel...

If you want to use Bootstrap 3, please check its manual to see how to use it. And better uninstall Bootstrap 2 as it seems you are confusing the two extensions' panels.

Thank you