ER Error

Could somebody give suggestion for error below, pls... I try running Enterprise Replication on INF 7.24 UC1. When activate hosts1 (cdr1), it's running well, but for cdr2, failed.. all configuration exactly the same both of cdr1 and cdr2. here are the errors : Running version 1 at line 149 in file ./cdragt.c Trace Level: 10 at line 157 in file ./cdragt.c Trace produced to at line 165 in file ./cdragt.c Mon Aug 10 10:07:32 1998 INFO : Cannot open Trace File. INFO : ./k_cdr.c (375) starting INFORMIX Cdr Sub-agent mapserv.c (229) acquired context for <cdr1svr_shm> sname <cdr1svr_shm> number: 0 mapserv.c (229) acquired context for <cdr1svr> sname <cdr1svr> number: 0 mapserv.c (253) completed raw discovery phase mapserv.c (474) FOUND a dup: 3 for <cdr1svr> Cannot attach to shared memory. errno = 22 shmqry.c (493) error attaching to shared memory mapserv.c (387) Entry NOT Usable context: <cdr1svr_shm> InDir: </opt/informix/7.24> Onc: </opt/informix/7.24/etc/onconfig.cdr1svr> snSrv: <cdr1svr_shm> Any reply would be appreciated.... rgds Sahrul