[AccessD] OT-Call Click Routine From Form Behind

To all,
 
Visual Basic 6 question, I have a personnel form with the option to block assign their availability for certain days, which is another form which opens in front of the personnel form.  I have a menu on the personnel form which includes and update option, which in turn has a click routince Private Sub OptUpdateAvailability_Click().  On the form which appears in front of the personnel form I have a button, when the button is pressed I want to call the OptUpdateAvailability_Click() rountine.  I have tried Call frmOrrPersonnel.OptUpdateAvailability_Click but get the following error when I try a compile:
 
            Method or Data Member Not Found
 
Anyone any ideas how I can cal the routine ?
 
Thanks in advance for any help.
 
Paul Hartland

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