VB6 - Pie Chart

I have written the following code to draw a pie chart in picture box and the code is working fine if it is put inside button click. But the same code is not working in form load. Neither it is throwing some error. Can anyone tel why it is like that?

Private Sub Form_Load()

Picture1.BackColor = &H8000000E
Picture1.ScaleMode = vbPixels

Dim conn As New ADODB.Connection
Dim rs As New ADODB.Recordset

With conn
.Provider = "Microsoft.JET.OLEDB.4.0"
.Open "C:\Class database\CLASS.mdb"
End With

Dim sql As String
If rs.State = adStateOpen Then rs.Close
sql = "Select * from "
rs.Open sql, conn, adOpenStatic, adLockBatchOptimistic

Dim rs1 As New ADODB.Recordset
If rs1.State = adStateOpen Then rs.Close
sql = "Select * from "
rs1.Open sql, conn, adOpenStatic, adLockBatchOptimistic

Dim rs2 As New ADODB.Recordset
If rs2.State = adStateOpen Then rs.Close
sql = "Select * from "
rs2.Open sql, conn, adOpenStatic, adLockBatchOptimistic

Dim rs3 As New ADODB.Recordset
If rs3.State = adStateOpen Then rs.Close
sql = "Select * from "
rs3.Open sql, conn, adOpenStatic, adLockBatchOptimistic

Dim rs4 As New ADODB.Recordset
If rs4.State = adStateOpen Then rs.Close
sql = "Select * from "
rs4.Open sql, conn, adOpenStatic, adLockBatchOptimistic

Dim w, x, y, z, z1 As Double
w = rs.RecordCount
x = rs1.RecordCount
y = rs2.RecordCount
z = rs3.RecordCount
z1 = rs4.RecordCount

Dim xx, yy, zz, uu As Double
If w = 0 Then MsgBox "There are no records for" & DateTime.Date & "to be displayed"
If w > 0 Then
xx = (x * 100) / w
yy = xx + (y * 100) / w
zz = yy + (z * 100) / w
uu = zz + (z1 * 100) / w
Call DrawPiePiece(QBColor(1), 0.001, xx)
Call DrawPiePiece(QBColor(6), xx, yy)
Call DrawPiePiece(QBColor(3), yy, zz)
Call DrawPiePiece(QBColor(5), zz, uu)
End If

End Sub

Public Sub DrawPiePiece(lColor As Long, ByVal fStart As Double, ByVal fEnd As Double)
Const PI As Double = 3.14159265359
Const CircleEnd As Double = -2 * PI
Dim dStart As Double
Dim dEnd As Double
Picture1.FillColor = lColor
Picture1.FillStyle = 0
dStart = fStart * (CircleEnd / 100)
dEnd = fEnd * (CircleEnd / 100)
Picture1.Circle (170, 150), 100, , dStart, dEnd
End Sub