Failed to configure Ethernet using DHCP

I build a homemade board with a 328 and the ENC and is working great.

But some examples from ethercard are not working, all most some function at the library are missing.

The example that I can't compile is this:

GetDHCPandDNS

The function that I can't found is this:

ether.dhcpExpired()

Other thing is use the reset pin from the ENC before do the DHCP procedure.

Best Regards
Frank