Router Frame Relay Error (Packet Tracer)

[masterelahee]

I am having an error when typing in the command 'frame-relay switching' to enable it at the global config mode

FrameRelay(config)#frame-relay switching

                   ^

% Invalid input detected at '^' marker.



FrameRelay(config)#interface s2/0
FrameRelay(config)#encapsulation frame-relay 
FrameRelay(config-if)#frame-relay intf-type dce

                                  ^

% Invalid input detected at '^' marker.