Are you praying to the only true God?
Christianity holds to the view that prayer is of the leading of the Holy Spirit. Octavius Winslow put it in these words: It must be acknowledged by the spiritual mind that all true prayer is of the leading of the Spirit; that He is the author of all real approach of the soul to God. All true prayer is put into words by the Spirit. He is the Author of prayer in the soul.
Source: renewamerica.com