Help with syntax

Hi all
Would anyone know the proper syntax in vba for the following:

Set IVIEW = "C:\Program Files\IrfanView\i_view32.exe" " & Topazout & "/crop=(67,200,326,236) /convert="C:\InsigArch\" & Tickno.bmp"

It is a call to Irfanview to crop an image specified by the var name 'Topazout' and save the cropped image using var name Tickno.

access vba hits the 3rd " and hangs with 'Expected end of statement'

many thanx