We're running Informix 9.4 on Windows 2000 Server (sp4) with Arcserve
11 Backup Agent for Informix.  These two pieces of software are
installed on a "clean" machine (flattened and rebuilt).  Just after
the Informix 9.4 software and the Arcserve agent was installed, I ran
a full backup from the Arcserve Manager server.  It worked just fine.
The DBA started tweaking the Informix server to get it ready to import
the data from our production database and now it won't allow us to
back it up any more.  We get the Unable to open connection to database
server 155 (0x9b) error.  I have another clean system that I installed
a similar configuration on and it has continued to allow us to use
Arcserve to back up the database (no changes were made to the Informix
server configuration though).  A couple of other notes - the Arcserve
manager resides on a separate server and all of the servers in my
configuration are workgroup (not domain) servers.  We've compared the
configurations of the two servers mentioned above and re-entered
configuration data until we're blue in the face.  About the only thing
we haven't done is uninstalled and/or re-installed any of the
software.  Anyone have any ideas about what might be causing this
problem?

Thanks, Rochelle