an upload model (upload - resize - watermark) problem it wont resize!!!

Code:
function upic($fieldn, $usern, $order=0) {

        $this->load->library('image_lib');

        $pathme=realpath('photos');

        $pathimg=realpath('img');

          // upload

         $config['upload_path'] = $pathme;

        $config['allowed_types'] = 'gif|jpg|png|bmp|jpeg';

        $config['encrypt_name']= TRUE;

        $picin['order']=$order;

        $picin['user']=$usern;

        $this->load->library('upload', $config);

        if ( ! $this->upload->do_upload($fieldn)) {

        //    die ($this->upload->display_errors());

        } else {

            $picin['name']=$this->upload->getme();

            $this->db->insert('pics', $picin);

            $config['width'] = 370;

            $resize_config['source_image'] = $pathme."/".$picin['name'];

            $resize_config['width'] = 370;

            $resize_config['maintain_ratio']=TRUE;

            $this->load->library('image_lib', $resize_config);

            // RESIZE

            $resize_config['source_image'] = $pathme."/".$picin['name'];

            $resize_config['width'] = 370;

            $resize_config['maintain_ratio']=TRUE;

            $this->image_lib->initialize($resize_config); 

            $this->image_lib->resize();

            // END RESIZE

            // WM

            $wm_config['source_image'] = $pathme."/".$picin['name'];

            $wm_config['wm_type'] = 'overlay';

            $wm_config['quality']='100';

            $wm_config['padding']='2';

            $wm_config['wm_vrt_alignment']='bottom';

            $wm_config['wm_hor_alignment']='right';

            $wm_config['wm_overlay_path']=$pathimg."/WM.png";

            $wm_config['wm_opacity']='80';

            $this->image_lib->initialize($wm_config);

            $this->image_lib->watermark();

            // END WM

        }

    }