apcupsd port not starting

[dave]

Hello,
    I've got the latest apcupsd port installed on my 5.2.1 machine. I've got
an APC xs1500va UPS which is supported. I'm going by the apcupsd user's
guide and have set both UPSTYPE and UPSCABLE to usb however when i start
apcupsd i keep getting the message:
"apcupsd driver type usb not found"
and it suggests i rerun configure with the --enable-usb option. I check the
port and one of the args passed to it's configure is --enable-usb.
    Any help appreciated.
Thanks.
Dave.