How to configure date format in a block intervalMaster

Visio 2000. I have created a new stencil and have created block interval
shapes by copying a Block Interval shape from the Timeline Shapes stencil.
This works OK but when you drag the shape onto a drawing the date format is
DD/MM. I want to change the default date format to MM/YY but cannot find how
to do this.

If I edit the master the 'configure interval' option appears but nothing
happens when I click on it. Once the master is dragged onto a drawing it
works OK and you can reconfigure the interval.

Any Ideas?

the timeline addin uses 'masks' for formatting. some examples

Const mskDate As String = "{{M/d/yyyy}}"
Const mskHour As String = "{{HH:mm}}"
Const mskBEHour As String = "{{M/d/yyyy h:mm am/pm}}"

al
"JMacG" wrote in message
...
Visio 2000. I have created a new stencil and have created block interval
shapes by copying a Block Interval shape from the Timeline Shapes stencil.
This works OK but when you drag the shape onto a drawing the date format
is
DD/MM. I want to change the default date format to MM/YY but cannot find
how
to do this.

If I edit the master the 'configure interval' option appears but nothing
happens when I click on it. Once the master is dragged onto a drawing it
works OK and you can reconfigure the interval.

Any Ideas?