Excel 97 - What the? Printpreview

Sorry about posting this again, but I just stumbled on the weirdest thing. Can anyone explain to me the difference between these two subroutines? Or why the first one works and the second one doesn't.

VB Code:

Sub printsheet()
Dim RngSelectedPrint As Range
Set RngSelectedPrint = Worksheets(1).Range("A1:d20")
RngSelectedPrint.PrintPreview 'enablechanges:=False
Worksheets.PrintPreview enablechanges:=False
End Sub

VB Code:

Sub printsheet2()
Dim RngSelectedPrint As Range
Set RngSelectedPrint = Worksheets(1).Range("A1:d20")
RngSelectedPrint.PrintPreview enablechanges:=False
Worksheets.PrintPreview enablechanges:=False
End Sub

"print preview method of range class failed" ? what the?
At first I thought this was an error caused the version of Excel I was in. Turned out to be a coding issue.

And yes - I know I have two back to back print preview statements. It's to show the diff between accessing from a worksheet and a defined range.

FWIW I use XL97 and can reproduce the fault.

I tried it on three machines, using XL97 and XP and got the same error result.

It is a result of the following code:
RngSelectedPrint.PrintPreview enablechanges:=False
which works, if you omit the enable changes parameter.

Using the worksheet as the object, the parameter works fine,
Worksheets.PrintPreview enablechanges:=False

Still would like to know if anyone else but me is getting this same result, and what a work-around or fix could be. I want to gain access to the enable changes parameter, but I also need to specify a certain range area, not the total worksheet.