Need Help!- Galil DMC-1740 Communication

[python01]

I am trying to communicate with Galil DMC-1740 which is pnp. I am using vb and according to Galil ocx documentation the controller number should be between 1 and 16 so I am trying to do the following to open communication:
Dim CtrlNum As Double

JetCutter.DMCShell1.DMCController = 1
JetCutter.DMCShell1.DMCConnect = True
JetCutter.DMCShell1.DMCCommand = "CNTRLNUM="
CtrlNum = Val(JetCutter.DMCShell1.DMCResponse)
If CtrlNum <> 1 Then
MsgBox "Controller Initialization Error, Controller #" & CtrlNum
Else
MsgBox "Controller Initialization OK, Controller #" & CtrlNum
End If

Every time I run the software the "Error" message comes up and shows controller #0 which is invalid value for DMCController

Does anyone have any suggestions how to approach it?

[Al_The_Man]

Can you communicate with the card using the Terminal program?
Al.

[python01]

Yes I can,
I actually got it to work as controller 0, that what CNTRLNUM= returns in terminal. Just wonder why when
- 0 is invalid value for dmcshell1.controller
- why I cannot change the controller # using dmcshell1.controller

My understanding was that I could choose controller number for this controller. Could it be because it is the older ISA version?
Just think it might be good idea to understand this stuff for the future.