Postslider.php – adding WPML if lang link between nav arrows

Hi,
I’m trying to add a link between arrows in posslider depend on current language.
I added two following lines in 507 line in Postslider.php file and it seems not to work.
Is anything wrong with the code?

		protected function slide_navigation_arrows()
		{
			 
			$html  = "";
			$html .= "<div class='avia-slideshow-arrows avia-slideshow-controls'>";
			$html .= 	"<a href='#prev' class='prev-slide' ".av_icon_string('prev_big').">".__('Previous','avia_framework' )."</a>";

if ( ICL_LANGUAGE_CODE=='it' ) { $html .= 	"<a href='/it/archive'>"Archive IT"</a>";}
elseif ( ICL_LANGUAGE_CODE=='en' ) {  $html .= 	"<a href='/en/archive'>"Archive EN"</a>"; }
		

			$html .= 	"<a href='#next' class='next-slide' ".av_icon_string('next_big').">".__('Next','avia_framework' )."</a>";
			$html .= "</div>";

			return $html;
		}

Thank you for suggestions.