fixing and string. previous commit is because of patch by Dennis Craven and me taking the strings/coding standrads review and stuff. fixing #382. Thanks Dennis once again

src/common/connection.py

@@ -845,7 +845,7 @@ class Connection:
 		if not con_type:
 			gajim.log.debug("Couldn't connect to %s" % name)
 			self.dispatch('ERROR', _('Could not connect to "%s"') % name,
-				_('Please try again later'))
+				_('Check your connection or try again later'))
 			return False
 		gajim.log.debug('Connected to server')
 		# FIXME! This blocks!