Hello all.  Quick  question.  We successfully configured db functionality using Postgres to support HA, which is working quite well.  The one anomaly we see is that when in a conference and the originator would like to add a member, originator sends a "Refer" to Fs conference server.  That triggers FS conf to generate "Notify's" that are sent just after the "Refer" with a sipfrag 100/Trying and it's sipfrag 200/Ok response.  This functionality works with sqlite, but not with Postgres.  Any ideas on what we maybe missing?  Below describes the messages flow. 

Member A joins FS conference

Member A would like member B to join so member A sends a "Refer" to FS conference server requesting conference server to invite member B.

FS conference server sends invite to member B

FS conference server sends member A a "Notify" with sipfrag 100/Trying  (this does not happen now)

FS conference server sends member B and invite per the "Refer" sent to it

(normal call flow for member B continues as he/she joins)

FS conference server sends member A a "Notify" with sipfrag 200/Ok (this does not happen)