Acc97: Use button on a form to run a FoxPro .exe

I'm using a form with buttons as a menu in Access97.  I want to create a button on that menu that runs an .exe file created by our FoxPro programmer.  If I run the .exe from a WindowsXP shortcut icon, it runs fine.  But when I try it from my Access button, it starts running, then fails with the message "invalid path or filename".

Here's the code:
Private Sub exeCreateCustInvenDBF_Click()
On Error GoTo Err_exeCreateCustInvenDBF_Click

    Dim stAppName As String

    stAppName = "F:\FOXPROW\NEWFOX25\EXECUTE\PRODNIPR.EXE -t"
    Call Shell(stAppName, 1)

Exit_exeCreateCustInvenDBF_Click:
    Exit Sub

Err_exeCreateCustInvenDBF_Click:
    MsgBox Err.Description
    Resume Exit_exeCreateCustInvenDBF_Click
   
End Sub


I'm assuming that the difference is that when I create a Windows shortcut there is a "Start In" blank for entering the path to the files used by the program you're running.  But I don't know how to do the same thing in Access.

Thanks for your help.