[Spread-users] Multicast help

[Mark Snelling]

Hi

I'm trying to set up a simple multicast segment with three Windows machines. 
My spread.conf simply has the lines below:

Spread_Segment 239.0.1.3 {
 wcc013 192.168.147.187
 wcc014 192.168.147.54
 wcc035 192.168.147.43
}

However when I try and run spread, I get the following messages and the 
daemon terminates:

Successfully configured Segment 0 [239.0.1.3:4803] with 3 procs:
                      wcc013: 192.168.147.187
                      wcc014: 192.168.147.54
                      wcc035: 192.168.147.43
Finished configuration file.
Hash value for this configuration is: 432108239
Conf_load_conf_file: My name: wcc014, id: 192.168.147.54, port: 4803
DL_init_channel: problem in setsockopt to multicast address -285212413
Exit caused by Alarm(EXIT)

I've read the user guide but it sheds no light on this.

Any help appreciated.

Mark.