ctree pixmap

["Blowfish" <blow_fish telkom net>]

i tried to put an icon to my ctree it works but i get this 
warning msg, how can i avoid that ?

Gdk-WARNING **: Creating pixmap from xpm with NULL window 
and colormap

here's my interface.c

create_window(....)
{

........
........

pixmap = gdk_pixmap_create_from_xpm (effect_ctree->window, 
&mask, 
	&style->bg[GTK_STATE_NORMAL], "pixmaps/effect.xpm");

node = gtk_ctree_insert_node (GTK_CTREE (effect_ctree), 
parent_node, NULL, text, 5, pixmap, mask,pixmap, 
mask,FALSE, FALSE);

......
......

}
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