We believe in the administration of spiritual gifts through the operation of the Holy Spirit; the gifts of the evangelists, pastors, and teachers, (Ephesians 4:7-12), are sufficient for the perfecting of the Church today.  Sign gifts, including tongues, gradually disappeared as the Canon of Scriptures was completed and the authority of the Bible generally recognized.  But God, being sovereign in the bestowment of all His gifts, does hear and answer prayers of faith according to His own will for the sick and the afflicted.
Biblical support for the above:
Ephesians 4:7-12
Romans 12:3-8
1 Corinthians 12:4-11
James 5:13-16
1 John 5:14-15