Your class module has a procedure name that conflicts with the name of an event. This error has the following cause and solution:
Sub Form_Load (MyParam As Integer)
. . .
End Sub
If the procedure isn't the event procedure corresponding to the event, change its name. If the procedure corresponds to the event, make the parameter list agree with that required by the event (if any).
For additional information, select the item in question and press F1 (in Windows) or HELP (on the Macintosh).