Help! for informix-sql demo

Hello, I'm trying to install the informix-sql demo database using "isqldemo". The version I'm using is Version 2.10.00B for unix pmax_mach. I got the following error messages when runing "isqldemo": "INFORMIX-SQL Demonstration Database Installation Script Dropping existing stores database .... Error in line 1Near character position 21 Creating stores database .... Error in line 1Near character position 2 Error in line 13Near character position 2 Error in line 9 ... (more errors like above) Now copying PERFORM source files .... Now copying ACE source files ...." After the script, I get in my working directory "stores.dbs" along with other .sql .ace files etc. But nothing is found in stores.dbs. I can start "isql" ok, but when I tried to access database stores, I got error: 329: database not found or no system permission 2: no such file or directory If I tried to create my own db, I got the error: 330: cannot create database". I would appreciate any hints. Thanks a lot! Yan Qu yqu@cs.cmu.edu