I have a problem to view the key to facebook, i enclose pictures

Please post a link to your forum so I can see what is going on.

Your entire forum requires logging in to see anything- Even threads. Facebook won't work if it can't access your site, and it can only access your site as a guest.

I have two forums on one works on this does not work the link to the other is www.mundosatellite.com and it works great

On the first forum (the one with the problem) as a guest I can't even see the button/navbar... On the second forum as a guest I can see the button and navbar because it is blocked in a different way.

The first forum you have "Can View Forum" set to NO in Guest Usergroup.

On the second forum you have "Can View Forum" set to YES.

I have set to yes on the first forum if you want to see thanks

Thanks- from what I can tell it looks like the button is forming but is being pushed away by some other page element.

Can you try it with the default VB style?

To get the default style go to Admin CP -> Styles & Templates -> Style Manager -> Add New Style and create a new style with no parent style. This will be the default style.

Then go to Admin CP -> Settings -> Options -> Style & Language Settings and give permission for users to change styles (if it was disabled) so you can change to the default style to test it.

Ok done, but still does not see, my default style and that i have only changed the colors, however in all eating styles cannot be seen, thank you for your interest

Have you tried the Facebook Box Count style to see if that one displays?