Could anyone explains to me why there is only 1 VC up (which is VLAN 193)? and what is required to make both the VCs up and functional?
YES
you need to correctly understand the mechanism of L2VPN:
if you are site 1 the first mentioned interface is connected to site 2, the 2nd interface is connected to the nonexisting site 3
therefore you only see one working
if you are site 2 then the first interface is the connection to site 1 the second interface is the connection to site 3 ( again nonexisting in your case and therefore not working)
also there is a "show l2vpn connection" command which is good for troubleshooting
regards
alexander