Starting Data Replication Question

Hello, I have been assigned to set two computers as servers for replication, spu11 and spu12, using Informix! I have followed all the steps for a physical backup on spu11 (primary) and have restored the database on spu12 (secondary). I followed the steps on the "Universal Server Administrator's Guide", chapter 30, "Using Data Replication", section "Starting Data Replication for the First Time." These steps included using onarchive and ondatartr. Everything seems all right as far as the backup is concerned. Following the steps, I set spu11 to primary, and that works. When I try to set spu12 as secondary I get an error. The command is, onmode -d secondary spu11. The feedback is DR: Unable to change server type. The server spu11 is on the right mode, recovery, according to the manual. Any suggestions? -Maria