Open a record identified by a subform's control on a 2nd form

[roita]

I store image names in a table with a key field named [PictureID].
These pictures may be scrolled through in a form called Form1 .
I have a [Purchase Order] Form with contains a subform called [Purchase Order Details Subform] This subform displays as a datasheet. On this Subform I have a field called [PictureID]

I would like to dbl click on the [PictureID], open Form1 and go to the record with the same PictureID.

Right now I get a parameter box which asks for the PictureID name.

I can do this fine, if I open the [Purchase Order Details Subform] subform by itself, but not when I access it via the parent form.