I'm trying to open a pdf file from a button on a grid component. Each row has a button that should open a corresponding pdf.

I have a data field in my dbf file (Doc_path) with the path i.e. C:\A5Webroot\TCNonline\TCNdocs\TCNrules.pdf
The button is defined as a Link field; link address type: Field value is link address
Using Action Javascript to open the pdf; pdf filename is: {Doc_path}
I keep getting a 404 not found error but can't find the cause. If I cut and paste the above path in my browser, it opens the file just fine. ???

See screenshot: http://ezsnap.com/z/DDwIswKH.jpg

Please help me get on the right track.