Why this flash drive not detected in devd?

[Sagara Wijetunga]

Hi FreeBSD community

This is FreeBSD 7.2 on i386.

sysctl -a | grep dev.umass
dev.umass.1.%desc: Imation Flash Drive, class 0/0, rev 2.00/1.03, addr 3
dev.umass.1.%driver: umass
dev.umass.1.%location: port=6 interface=0
dev.umass.1.%pnpinfo: vendor=0x0718 product=0x0081 devclass=0x00 
devsubclass=0x00 release=0x0103 sernum="14925B00" intclass=0x08 
intsubclass=0x06
dev.umass.1.%parent: uhub4

Following added to /etc/devd.conf:
# Imation Flash Drive, class 0/0, rev 2.00/1.03, addr 3
attach 200 {
    match "vendor"  "0x0718";
    match "product" "0x0081";
    match "serial"  "14925B00";
    action "touch /tmp/Imation-Flash-Drive-detected";
};


Could I know why the flash drive is not detected on attach?

Kind regards
Sagara