ActiveX Cntroll-Run Time Error

Hi to everybody!

I have developed a Max Script code lines to handle an ActiveX Controller,
but each time i try to set a property of the ActiveX Control, a Run Time Error happen.
For Example,
when i execute this line:

ax.NavigationBar = "0"

this Run Time Message appear in a message box:

The property needs an index, use setIndexedProperty #NavigationBar

If a set another property, for example: ax.Scene= "TestFile.wrl" the same Run Time Error happen:

The property needs an index, use setIndexedProperty #Scene

But after the ActiveX Control work properly!!!!
How may i solve the problem?
Thank you again.