Here is my code:

Dim wsSheet As Worksheet
   Dim rngNext As Range
   Dim myRange As Range
   Set wsSheet = ActiveSheet
   With wsSheet
       Set rngNext = .Range("F65536").End(xlUp).Offset(1, 0)
   End With
   rngNext.Select
   Set myRange = Range("F2", rngNext)
   
    'populate Group combobox list
   With combStation
       Selection.End(xlUp).Select
       For Each rngNext In myRange
           If rngNext = "" Then
               Selection.End(xlUp).Select
           End If
           .AddItem rngNext
       Next rngNext
   End With

Here is my problem:

When I have the worksheet set at:

 Set wsSheet = ActiveSheet

The userform works as planned and I continue. When I try to set it to:

 Set wsSheet = Worksheets("List1")

I get a Run-Time error '9': and the userform fails. I have isolated the
problem to that line a code.  I tried the obvious and saved the workbook.
From there I need ya'll help.

Thanks in advance,
Ryan