Outlook 2K Form - CustomPropertyChange event

[GeekGirlau]

I posted this question in the VB Script forum as well, but haven't yet found the answer.

I have a custom form in Outlook that uses the CustomPropertyChange event to hide or display different controls each time the value is changed within a list box. Sample of the code appears below:

Sub Item_CustomPropertyChange(ByVal Name)
Select Case Name
Case "ServiceLevel"
Set myPages = Item.GetInspector.ModifiedFormPages

Select Case Item.UserProperties("ServiceLevel&quot.Value
Case "Level 1"
myPages("Message&quot.Controls("txtLevel1&quot.Visible=True
myPages("Message&quot.Controls("chkLevel1_1&quot.Visible=True
...

Case "Level 1+"
...

Case "Level 2"
...
End Select
End Select
End Sub

The code runs perfectly if I use the "Run this form" option from Design View within Outlook. However if I open the form from Explorer or launch it via MS Access, the code doesn't run.

HELP!!!