EOutOfResources Error (Unable to insert a line) doing a TQuery

I'm trying to list customer's names on text combobox ( more than 1000
records listed), using a query.  While I run the application, it raises
EOutOfResources Error( It says "unable to insert a line') and points


Then, I just run it again.. I'm able to get some records (like about 50
to 100 ).  

How can I fix this problem???

Sandra Kim, SSDS Inc.