How to turn off the expire of the page

this thing drives me mad

SunChase	#13813 2009-07-06 23:45
Members	lets try another way.HOW to turn it off once so it wont bug in the future and to completely erase that field from the page.add and page.edit? [url=http://ka13.orgfree.com]KA13[/url] - The essence of creativity