Hello, I'm new to FS and trying to build from the source tarball using VS 2008 Express on Windows Vista. Most of the FreeSwitch solution builds successfully, except for some of the sofia support modules. There are many errors, which leads me to believe that I have a missing compiler switch or some other setting. I started by opening the solution file Freeswitch.express.2008.sln. The first few errors are related to the MSG_HEADER_CLASS macro, being called from the sip_basic.c file: ..\..\sofia-sip\libsofia-sip-ua\sip\sip_basic.c(121) : error C2065: 'sip_request_hash' : undeclared identifier ..\..\sofia-sip\libsofia-sip-ua\sip\sip_basic.c(121) : error C2099: initializer is not a constant ..\..\sofia-sip\libsofia-sip-ua\sip\sip_basic.c(121) : error C2065: 'sip_request_d' : undeclared identifier ..\..\sofia-sip\libsofia-sip-ua\sip\sip_basic.c(121) : error C2099: initializer is not a constant ..\..\sofia-sip\libsofia-sip-ua\sip\sip_basic.c(121) : error C2065: 'sip_request_e' : undeclared identifier ..\..\sofia-sip\libsofia-sip-ua\sip\sip_basic.c(121) : error C2099: initializer is not a constant There are many other errors from different source files, but I would guess that they are all related to some setting that I am missing. Thanks, and sorry for the newbie question. Chuck