[Serusers] RPID privacy

Hi, I am trying to give my users the option of disabling caller ID if they so choose by dialing a code. I can tack on rpid using append_rpid_hf() just fine, but for some reason my privacy flags seem to be ignored. Perhaps I am not processing them properly? One observation: I've noticed most people on the list using the format: append_rpid_hf("<sip:","@localhost; user=phone>;party=calling;screen=no;privacy=full") When use this format my tcpdumps show: Remote-Party-ID: <sip:sip:2125551212@my.sip-domain.com@localhost; user=phone>;party=calling;screen=no;privacy=full") I have to use: append_rpid_hf("<","; user=phone>;party=calling;screen=no;privacy=full") ...to get it to look correct in the headers. This strikes me as odd that everyone else uses the former and I must use the latter. I am using ser-0.9.3 (Soon to upgrade to 0.9.3!!) and the gateway is a Cisco AS5350. I've looked as Cisco DOCS and the header seems to be structured properly. I'm sure it is something stupid, but I am scratching my head on this one. Any advice? Thank you. Dan