image_view stereo_view do not show image or disparity

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I have been trying to view my stereo disparity image using image_view stereo_view but whenever i run it i get two blank left and right windows with the following error in terminal

init done opengl support available

(stereo_view:14758): GLib-GObject-WARNING **: invalid uninstantiatable type '(null)' in cast to 'GtkWidget'

(stereo_view:14758): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'

(stereo_view:14758): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(stereo_view:14758): GLib-GObject-WARNING **: invalid uninstantiatable type '(null)' in cast to 'GtkWidget'

(stereo_view:14758): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'

(stereo_view:14758): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed

(stereo_view:14758): GLib-GObject-WARNING **: invalid uninstantiatable type '(null)' in cast to 'GtkWidget'

(stereo_view:14758): GLib-GObject-WARNING **: instance of invalid non-instantiatable type '(null)'

(stereo_view:14758): GLib-GObject-CRITICAL **: g_signal_connect_data: assertion 'G_TYPE_CHECK_INSTANCE (instance)' failed * /camera/left/image_rect_color * /camera/right/image_rect_color * /camera/disparity

• I was able to get the images in rviz using camera display

• I am using ubuntu 14.04 with indigo distro

• how can i fix this problem?

anybody please help me