PC6300 Clock problem...

[PUT YOUR NAME HERE]

	I own an AT&T PC6300 and have a problem with my clock.  With the version of dos that came with the computer everything worked fine.  I have since upgraded to MS-DOS V3.3.  Now the clock does not keep time when the computer is turned off.  Is there a special driver I need or did the battery just mysteriosly go dead when I switched dos versions.
		Thanks for you info...
	LaterZ	     			K. Wade Turner