Error 2029 - Trying to run an 07' file on 03'

I have a file i made in 2007 that runs fine but when i try to run it in 2003 i get an error 2029 on the code below. It runs fine until the "Lock Partition Walls Cells" section. If i comment out those lines, it will error on the "Lock Framed Opening Cells"


Am i hitting a limit in my code somewhere that 2003 can not get past?

' Lock Open Walls Cells - Partition Walls - Framed Openings

Private Sub lockCells_OpenWalls()
Dim i As Long
Dim e As Long
Dim f As Long
Dim g As Long
Dim j As Long



Sheets("Gen_3").Activate
For i = 243 To 306
   If Range("H" & i).Value = "" Then
       Range("O" & i & ":V" & i).Cells.Locked = True
       Range("X" & i & ":AF" & i).Cells.Locked = True
   End If
Next i

For e = 243 To 306
   If Range("H" & e).Value = "None Requested" Then
       Range("X" & e & ":AF" & e).Cells.Locked = True
   End If
Next e

For f = 243 To 306
   If Range("C" & f).Value = "Front Sidewall:" Or Range("C" & f).Value = "Back Sidewall:" Then
       Range("X" & f & ":AF" & f).Cells.Locked = True
   End If
Next f

' Lock Partition Walls Cells

For g = 111 To 238
   If Range("W" & g).Value <> "Sheeted one side w/:" Then
       Range("AB" & g & ":AH" & g).Cells.Locked = True
   End If
Next g


' Lock Framed Opening Cells

For j = 459 To 562
   If Range("H" & j).Value = "" Then
       Range("N" & j & ":R" & j).Cells.Locked = True
       Range("T" & j & ":X" & j).Cells.Locked = True
   End If
Next j




End Sub

Hi PY_
error 2029 is cell name error
try..

 Range("a" & j & ":R" & j).Locked = true