How to pass an array a subroutine Excel VBA

Hi,

I am trying to write a script that scans the contents of the first cell in the first 52 columns, then askes the user which columns they have data in that they would like merged. Then I would like to take their response and pass it to a subroutine to merge the cells appropriately. However, I am having trouble passing an array to my subroutine. I keep getting "Run-time error '1004': Application-defined or object defined error" Below is the snippet of code i am referring to. The error highlights the portion of code where i am merging 2 cells together. I think there is some sort of type mismatch, because when I change "Column" to a specific number...say 3, then the code runs without errors and merges the cells properly in column 3.

Private Sub cmdOkay_Click()
Dim i As Long, msg As String, Check As String, boxa As String, boxb As String
Dim Arr(52, 1)

Dim j, k As Integer
j = 0
k = 0

'Generate a list of the selected items
With ListBox1
    For i = 0 To .ListCount - 1
        k = k + 1
        If .Selected(i) Then
            msg = msg & .List(i) & vbNewLine
            Arr(j, 1) = k + 1
            j = j + 1
        End If
    Next i
End With
...
...
If Check = vbYes Then
    'CheckBox3
    If UserForm1.CheckBox3.Value = True Then
        Module4.Carrier_Merge Arr
    End If
    
    'Unload the userform since user is happy with selection(s)
    Unload Me
Else
    'User wants to try again, so clear listbox selections and
    'return user to the userform
    For i = 0 To ListBox1.ListCount - 1
        ListBox1.Selected(i) = False
    Next
End If
...
...
...
End Sub

Sub Carrier_Merge(ArrValues())

Dim i
Dim row1 As Integer
Dim row2 As Integer
Dim Column

Column = 0
row1 = 2
row2 = 3

Do Until IsEmpty(Range("A" & row1))
    If Right(Range("A" & row1), 2) <> "_3" And Right(Range("A" & row2), 2) = "_3" Then
        
        For i = 0 To UBound(ArrValues)
            Column = ArrValues(i, 1)
            Worksheets("Cell Site Demand").Range(Cells(row1, Column), Cells(row2, Column)).Merge
        Next i
        
          
       row1 = row1 + 2
       row2 = row2 + 2
       
    Else
  
    row1 = row1 + 1
    row2 = row2 + 1
      
    End If
    
Loop

...
...
end sub

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