[Serusers] SER 0.9.0 Startup problem

Hi Guys, Just trying to run 0.9.0 from CVS at the moment and it compiles fine, and installed Ok as far as I can see. I've been through ser.cfg and that looks ok, and certainly checks ok if I run 'ser -c -f /usr/local/etc/ser/ser.cfg'. However when I try to start ser in '-d -D' mode, I'm getting this : Listening on udp: 217.160.187.14 [217.160.187.14]:5060 tcp: 217.160.187.14 [217.160.187.14]:5060 Aliases: tcp: p15161795:5060 tcp: p15161795.pureserver.info:5060 udp: p15161795:5060 udp: p15161795.pureserver.info:5060 *: www.sftalk.net:* WARNING: no fork mode stateless - initializing ERROR: error -1 while trying to fix configuration Can anyone give me any clues as to why please? Many thanks, Ian Bonham