diff --git a/addons/caldav/wizard/calendar_event_export.py b/addons/caldav/wizard/calendar_event_export.py
index 042d3bc75b6..856d9e9bc91 100644
--- a/addons/caldav/wizard/calendar_event_export.py
+++ b/addons/caldav/wizard/calendar_event_export.py
@@ -32,38 +32,38 @@ class calendar_event_export(osv.osv_memory):
     """
     Export Calendar Event.
     """
-    def _process_export_ics(self, cr, uid, context):
+    def process_export_ics(self, cr, uid, ids, context):
         """
         Get Default value for file_path field.
         """
         model = context.get('model', 'basic.calendar')
         model_obj = self.pool.get(model)
-        calendar = model_obj.export_cal(cr, uid, context['active_ids'], context)
-        #TODO: check why returns wrong value
-        return base64.encodestring(calendar)
 
-    def _process_export_ics_name(self, cr, uid, context):
+        calendar = model_obj.export_cal(cr, uid, context['active_ids'], context)
+        self.write(cr, uid, ids, {'file_path': base64.encodestring(calendar)})
+        return False
+
+    def default_get(self, cr, uid, fields, context):
         """
         Get Default value for Name field.
         """
         model = context.get('model', 'basic.calendar')
         model_obj = self.pool.get(model)
         calendar = model_obj.export_cal(cr, uid, context['active_ids'], context)
-        return  'OpenERP %s.ics' % (model_obj._description)
+        res = super(calendar_event_export, self).default_get( cr, uid, fields, context=context)
+        name = 'OpenERP %s.ics' % (model_obj._description)
+        if 'name' in fields:
+            res.update({'name': name})
+        return  res
 
     _name = "calendar.event.export"
     _description = "Event Export"
 
     _columns = {
-              'file_path':fields.binary('Save ICS file', filters='*.ics', required=True),
+              'file_path':fields.binary('Save ICS file', filters='*.ics', readonly=True),
               'name':fields.char('File name', size=34, required=True, help='Save in .ics format')
                }
 
-    _defaults = {
-               'name': _process_export_ics_name,
-               'file_path': _process_export_ics
-               }
-
 calendar_event_export()
 
 
diff --git a/addons/caldav/wizard/calendar_event_export_view.xml b/addons/caldav/wizard/calendar_event_export_view.xml
index 48b6224c2c7..227822966d0 100644
--- a/addons/caldav/wizard/calendar_event_export_view.xml
+++ b/addons/caldav/wizard/calendar_event_export_view.xml
@@ -13,6 +13,7 @@
                     </group>
                        	<separator string="" colspan="4" />
                     <group colspan="4" col="6">
+                    	<button name="process_export_ics"  icon="gtk-execute" string="Genetate ics" type="object"/>
                     	<button  icon="gtk-cancel" special="cancel" string="_Cancel"/>
                    </group>
                </form>