I have a site running SCCS 5.0 , SWC 4.5 with a small group of agents that are having problems logging onto their Agent Desktop Display ( ADD ). For whatever reason , only 2 of the 6 agents can log on the ADD at any given time . When any 2 agents login , the remaining 4 agents receive this error message " Login failed - unable to initialize thread listening to data from multicast port 230.0.0.2 " . If the 2 original agents logout , any of the other 4 can take their place . It doesn't seem to matter who the agent is , what PC is used or when they login , the only common symptom is the 2 of 6 gaining access .Has anyone seen this before ? Any thoughts on where or what could be limiting the number of ADD users ? The local vendor seems to think this is some sort of network/multicast limitation but they don't know how to resolve the issue . Any suggestions will be greatly appreciated .