p3-profiler plugins_url() issue

class.p3-profiler-plugin-admin.php

<?php // file path is PLUGIN_PATH/classes/class.p3-profiler-plugin-admin.php

public static function load_scripts() {
	wp_enqueue_script( 'jquery' );
	wp_enqueue_script( 'jquery-ui-dialog' );
	wp_enqueue_script( 'jquery-ui-tabs' );
	wp_enqueue_script( 'jquery-ui-progressbar' );
	wp_enqueue_script( 'flot', plugins_url( '/js/jquery.flot.min.js', dirname( __FILE__ ) ), array( 'jquery-ui-core' ) );
	wp_enqueue_script( 'flot.pie', plugins_url( '/js/jquery.flot.pie.min.js', dirname( __FILE__ ) ), array( 'flot' ) );
	wp_enqueue_script( 'flot.navigate', plugins_url( '/js/jquery.flot.navigate.js', dirname( __FILE__ ) ), array( 'flot' ) );
	wp_enqueue_script( 'p3_corners', plugins_url( '/js/jquery.corner.js', dirname( __FILE__ ) ), array( 'jquery-ui-core' ) );
	wp_enqueue_script( 'p3_qtip', plugins_url( '/js/jquery.qtip.min.js', dirname( __FILE__ ) ), array( 'jquery-ui-core' ) );
}

/**
 * Load styles
 */
public static function load_styles() {
	if ( 'classic' == get_user_option( 'admin_color' ) ) {
		wp_enqueue_style ( 'jquery-ui-css', plugins_url( '/css/jquery-ui-classic.css', dirname( __FILE__ ) ), array(), P3_VERSION );
	} else {
		wp_enqueue_style ( 'jquery-ui-css', plugins_url( '/css/jquery-ui-fresh.css', dirname( __FILE__ ) ), array(), P3_VERSION );
	}
	wp_enqueue_style( 'p3_qtip_css', plugins_url( '/css/jquery.qtip.min.css', dirname( __FILE__ ) ), array(), P3_VERSION );
	wp_enqueue_style( 'p3_css', plugins_url( '/css/p3.css', dirname( __FILE__ ) ), array(), P3_VERSION );
}

template.php

<?php // file path is PLUGIN_PATH/templates/template.php ?>

<img src="<?php echo plugins_url( '/css/logo.png', dirname( __FILE__ ) ); ?>" alt="<?php esc_attr_e( 'Logo', 'p3-profiler' ); ?>" title="<?php esc_attr_e( 'Logo', 'p3-profiler' ); ?>" />

view-scan.php

<?php // file path is PLUGIN_PATH/templates/view-scan.php ?>

<img src="<?php echo plugins_url( '/css/icon_mail.gif', dirname( __FILE__ ) ); ?>" height="22" width="22" align="center"