URL link for tracking a package

I'm trying to set my scripts to be able to search the tracking number when they click the hyperlink, but for some reason I don't get the value I get the name of the UDF, but not what I put in there. Anyone has idea how to do it? please help

' Create the IE Object
Set ie=CreateObject("InternetExplorer.Application")
'
' Set IE Properties
ie.Top=0
ie.Left=0
ie.Height=700
ie.Width=800
ie.AddressBar=false
ie.MenuBar=false
ie.ToolBar=false
'
'
'retVal= oBusObj.GetValue("UDF_SPIFF_NAME_1$", strdata)

' Set the Navigation
ie.Navigate "www.averittexpress.com/trackLTLById.avrt +("UDF_SPIFF_NAME_1$")
'
'
' Unhide the browser
ie.visible=True