both autotext and fieldcode showing simultaneously

[Steve]

Hello,

A word 2002 (SP3) document has recently been misbehaving. When I
'insert autotext' file and path the output is as follows:

"FILENAME \p f:\path\to\file\filename.doc"

When I toggle the box field codes box in 'Tools / Options / View' all I
see is:

"FILENAME \p"

What I'd like to see is:

"f:\path\to\file\filename"

Thanks in advance for help