me.printform : picturebox = nothing

[Periko]

Hello,

I have a strange thing. I have a form on which i put a picturebox. I let my program draw a circle on this picturebox according to some values I have stored in my database.

I also have a button on this form with following code :
me.printform.

Result : at 50% of my clients, the form is printed with the circle in the picturebox on the paper, another 50% gets the picturebox without circle on the paper.

I thought it was a difference on a inktjetprinter or a laserprinter, but it's a mixed situation. Anyone seen this before ???

Kind regards...
Pedro...