Opening Excel Template from Access

I have made a form in Access to input data. I put a button on the form so I could click on it and open excel. But when I click on the excel button I want to open a specific template. A friend has helped me edit the code in Visual Basic and the following what I have:
Dim myExcelApp As Excel.Application

Set myExcelApp = New Excel.Application

myExcelApp.Workbooks.add ("c:\filename.xlt")
Call Shell(stAppName, 1)

Exit_invoice_Click:
Exit Sub

But when I click on the button in Access I get the following error

"Invalid Procedure Call or Argument"

So what do I change to make it work?

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