By 'turned on' I assume you mean that the toobar is not displayed? You can
add an autoopen and an autonew macro to force the custom toolbar on e.g. add
the command line below (edited to show the toolbar name in question) to each
of an autonew and an autoopen macro saved in the document template.
This will work in Word 2003 and will not affect operation in older versions.
CommandBars("Toolbarname").Visible = True

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> A word document is created through a user defined template having a
> custom button. Sometimes this button does not turn on while opening
[quoted text clipped - 12 lines]
> (10.2416.3501) SP-1. However, the button is always turnrd on when the
> doc is opened in MS Word 2002 (10.24219.4219) SP-2.