Call module macro not working

[behedwin]

I have activex buttons on my sheet.

i have this code in a module

Sub imghidd()
If extinstr1_label.Visible = False Then
extinstr1_label.Visible = True
extimage1_img.Visible = True
Else
extinstr1_label.Visible = False
extimage1_img.Visible = False
End If
End Sub

i have this code on my button click:

Private Sub Steg1Ext_button_Click()
imghidd
End Sub

I get the error variable not defined.
But the code still works. But always an error message

screenshot:
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How to solve this.
I have tried to type
sheet1. before the label and image name
But does not work.

 

[orsm6]

i thought to call another macro you had to write Call then the macro.... e.g.

private sub Steg1Ext_button_click()
call imghidd
end sub

 

[behedwin]

i thought to call another macro you had to write Call then the macro.... e.g.

private sub Steg1Ext_button_click()
call imghidd
end sub

I get the same error even if i add Call.

 

[Repush]

extinstr1_label is not set
like:
Set extinstr1_label = < label_name ><label_name></label_name>