I set servicedesk plus script for scan changes of systems when system locked in or loge in,(because of security reasons. i would know witch user is using system when somethings happend) but when i lock and unlock immediatly system for times,  just one time this script would run.is this script has time out?if yes how i can disable this time out?

i need to run this script every time that system is locked in or loged in.

im using servicedesk plus version 9.1.MSSQL 

so thanx