Auto Stack off!

ADT 2007
I can't find how to turn off Mtext fraction auto stack. There are instances where I need to enter text containing numeral & slashes (exp. date: 7/26/06)
that are not intended to be fractions and it gets to be a bore having to cancel the auto stack dialog box each time. Surely, a variable exists but it has eluded me. Help will be greatly appreciated.
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