Run A Macro On My Machine (Windows 2000 And Office 2003)

I'm trying to run a macro on my machine (Windows 2000 and Office 2003) and I keep getting an error on one method. Now I tried to run the same macro on a different machine (Windows XP and Office 2003) and it didn't error out.

Public strControlTitle As String
Public strControlTime As String
Public strControlUnit As String
Public intControlItem As Integer
Public intLastNameOnly As Integer
Public intDataType As Integer


Sub Main()
Dim strControlItem, strPageName, strValue, sigma, z95, z99 As String
Dim r, c, count, cmax, rmax, rt, ct, low, high, a, b As Integer
Dim lesscol As Integer
With ControlChartForm
.ComboBox1.AddItem ("Average Turn Around Time All Patients")....................