I have an odd problem that I am not sure where to go with.  I have setup kamailio dev (or the 4.0.0 branch) for IMS.  I have a pcscf, icscf, and scscf using all the example config files.  I also setup the fhoss for hss.  This 'seems' to works great for the handful of test users I have created.  The problem I have arises when a (or any) user logs out once logged out no user can logon or do anything again.  If I dump all the users from the database and readd them;  i am good to go again.

A capture of a user trying to logon after wards always gives me this:

500 Server error on UAR select S-CSCF,  which comes from the I-CSCF.

I honestly have no idea what more to provide and Im not sure if this is an kamailio or hss problem...  Also what is everyone using for an HSS... Do I even need an HSS can kamailio and the IMS modules do this already?