Temp Table not clear after the informix session has terminated

Hi, I've a store procedure that will be called by an application. The store procedure when invoked will create temp table 'with no log' option. After the procedure has run by the application, I make a select on the systabnames and found that the temp table is present there. My question is how can I clear the 'temp' table when a normal drop table command is unable to perform the task. In the first place, why is the temp table not cleared after the session has been terminated ?? I'm using ODS 7.22.uc2 and Solaris 2.5.1 Thanks JH