AlwaysOn Availability Setup

I have a windows 2012 standard 2 node failover cluster with 2 sql instances on it.

Node A --> Instance X --> Database "Test"

Node B --> Instance Y

I am configuring AlwaysOn for database "Test" on Instance X with replica instance as Instance Y. I get an error "Note: This is a Failover Cluster Instance. Failover Cluster Instances do not support AlwaysOn automatic failover" on the specify Replica Page".

I am not able to complete my configuration.