Methods not supported by freeradius source code

Hi all, after configure EAP2 module and test it with EAP-MD5 (it works properly) I want use the EAP-PSK and/or EAP-GPSK . But if I add in eap2 module ... eap2 { psk { } } When I run radiusd... it fails showing that "psk is unknown", how can these not native freeradius methods provided by libeap.so (hostap) be used? Thanks.