error in OnLine initialization(can't create 'sysmaster'

Hi, plattform: Solaris2.5,IDS7.23UC1 After initializing OnLine,this is what is written in "online.log": 17:32:42 Event alarms enabled. ALARMPROG = '/informix/etc/log_full.sh' 17:32:43 DR: DRAUTO is 0 (Off) 17:32:44 INFORMIX-OnLine Initialized -- Complete Disk Initialized. 17:32:44 Checkpoint Completed: duration was 0 seconds. 17:32:44 Dataskip is now OFF for all dbspaces 17:32:44 On-Line Mode 17:32:44 Building 'sysmaster' database ... 17:32:46 Error building 'sysmaster' database. 17:32:46 See '/tmp/buildsmi.508'. this is a part of '/tmp/buildsmi.508' file: This file is the output of the dbaccess command in the shell script, $INFORMIXDIR/etc/buildsmi. This script is run when Informix OnLine DSA is first initialized. It builds the database and tables which support the System Monitoring Interface. If you were directed to see this file, a problem probably occurred while building the database and/or its tables and views. See below for more information regarding any problems. Problems may have occurred if OnLine was shutdown after initialization but before the entire database was created. If this was the case, login as 'informix', rerun 'oninit', and wait for the message "'sysmaster' database created successfully" to appear in the OnLine message log before shutting down. Once it is created successfully, it should never need to be recreated. 25596: The INFORMIXSERVER value is not listed in the sqlhosts file or the Registry. Error in line 14Near character position 1 ... These error has appeared recently and previousely I didn't have such error and I had many databases on my instance. I've set all necessary env. vars and add appropriate line to 'sqlhosts' file. has any one had such a problem before? any idea would be greately appreciated regards --babak