Create failed for Availability Group Listener IP Address

Hi,

want to change ip of listenr or add new Ip to listener or delete listener but getting error on adding ip pls guide.

Create failed for Availability Group Listener IP Address 'IPaddress X.X.X.196 of Subnet mask 255.255.252.0 and SubnetIP x.x.160.0'.  (Microsoft.SqlServer.Smo)

pls guide

iffi