upgrading micros e7 v2.1
we recently purchased a used micros system off ebay.... we've redone all the menus and interfaces and whatnot. now we're onto setting up the credit card auth and the bank has told me that we need to upgrade to e7 v2.5 or higher. I tried calling micros, but since we did not purchase our system from them they clearly would not help me.
basically what i need to know is; why do i need to upgrade our system in order to run cc auth? And, if so, how cna i do this if i am unable to get the upgrade software from micros.
i am currently running e7 V2.1.1184.0 Patch 4b