vb2005 and RSLinx OPC

My system: SLC503 => 1747 PIC => PC
PC : RSLinx + SCADA VB2005
I have a problem when using RSlinx OPC in VB2005
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Public Class frmMain
'Khai bao OPC
Public MyRsLinxOPCServer As RsiOPCAutPCServer
Public WithEvents MyRSLinxOPCGroup As RsiOPCAutPCGroup
Public LinxItem1 As RsiOPCAutPCItem
Public LinxItem2 As RsiOPCAutPCItem

Private Sub initialOPC()
'Dim TransID As Int64
'Dim CancelID As Int64
'Dim i As Integer
'Create Server
MyRsLinxOPCServer = New RsiOPCAutPCServer
'Connect to Server
MyRsLinxOPCServer.Connect("RSLinx OPC Server")
'Add Group to Server, Group name can be anything you want it to be
MyRSLinxOPCGroup = MyRsLinxOPCServer.OPCGroups.Add("TEST")
'Set Group Active for Data Updates and Events
MyRSLinxOPCGroup.IsActive = True
'Group Update Rate
MyRSLinxOPCGroup.UpdateRate = 10
MyRSLinxOPCGroup.IsSubscribed = True
''''''''''
'Add Items to Group, the specifier on the end Needs to be Unique for each Tag
LinxItem1 = MyRSLinxOPCGroup.OPCItems.AddItem("[MM4inchs]F17:0", 1)
LinxItem2 = MyRSLinxOPCGroup.OPCItems.AddItem("[MM4inchs]F17:4", 2)
End Sub
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Base.Load
initialOPC()
End Sub
End Class
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Help me !!!! Thanks verry much

What flavor of RSLinx are you using (hopefully not lite)? This question would be better posted at the OPC Foundation forum.

Make sure that you have the correct version of RSLinx (anything other than RSLinx Lite?). If the menu bar has an item option 'DDE/OPC' then you have a suitable version.

Click on 'DDE/OPC' & make sure that the topic 'MM4inches' exists in the topic list. If not add it & set the correct data source & data collection etc.

Help me!!! Thanks

How about answering some questions...

What version of RSLinx are you using? Does it support OPC?

If you are using a version of RSLinx that supports OPC, does the topic 'MM4inches' appear in the topic list?

What is the error (in detail) that Visual Studio is generating?

If you cannot be bothered to provide any details of the exact nature of YOUR problem, I think that you will find that there will be few people willing to help you.