jimhuffman,
This prayer is very wrong as are many things with the Antiochians. Orthodox Christians venerate Mary and appeal for her powerful intercessions with her Son; if we ask her to find us worthy, it is only to this end. Even in Orthodox prayer books when we say ask the Theotokos to "save us", this is just to mean "pray for us", or "by your prayers we might be saved". This prayer has obvious Roman Catholic overtones. I recommend you find an Orthodox church to go to.
Also, why were you saying "communion prayers" when the priest was not there?