If lowBalance is not set, then do not run the void_prepaid:task function.

modules/voip_prepaid/voip_prepaid.inc.php

@@ -78,6 +78,8 @@ class voip_prepaid
 	{
 		include_once(PATH_MODULES.'email_template/email_template.inc.php');
 
+		if ($this->lowBalance)
+		{
 			// delete expired pins?
 			// $delrs = & $db->Execute(sqlDelete($db,"voip_prepaid"," date_expire <> 0 and date_expire is not null and date_expire > ".time()));
 
@@ -98,6 +100,7 @@ class voip_prepaid
 				}
 			}
 		}
+	}
 	
   
 	/** provision pin */