exclusive lock of database

Hi there, My dababase is Informix IDS7.3. I usually use dbaccess to create table. There's no trouble most of the time, but sometimes I found that if I stay in "create table" menu for a longer period(say 5 minutes), the database became exclusively locked. Could anybody help me to avoid this happening again? Any message from you will be appreciated best regards -- Posted via CNET Help.com http://www.help.com/