onirisweb on "wp_is_mobile doesn't work with my theme"

Hi there,

It seems that I have a conflict with wp_is_mobile function and my theme which is OneStudio.

I would like that some parts appear only in the mobile version, that's why I want to use this function. But nothing happens :(

Here is an example of my code (in case of I haven't programmed it correctly):

if ( wp_is_mobile() ) { ?>
						<header id="logo" class="col grid2<?php if(empty($smof_data['custom_logo'])) echo ' text-version'; if(!empty($smof_data['hide_header_menu'])) echo ' no-menu'; if(!empty($smof_data['logo_expand'])) echo ' expand'; ?>">
		</header>
				<?php  }    ?>

I tried plugins that propose the same kind of option. Same result = no result.

I precise that other conditional tags like if(is_page('mypage')) work.

There's no installed plugin on my site.

I tried to contact the theme author...he says that there is no problem between his theme and the function, which isn't true.

I am sure that there's a function from the theme blocking the mobile detection function.

How can I see that and solve this issue ?

Thanks for your reply