udev rule matching using ENV

[william <kc@xxxxxxxxxxxxxx>]

Dear list

i am trying to create a udev rule which executes a script whenever a usb 
stick is removed with a particular uuid

The uuid is changeable and we have a common settings file which exports 
the UUID from the usb partition.

What i would like is to import the UUID from the settings file and match 
that with the actual ID_FS_UUID with the remove action.

So i created 99-remove-usb.rules with the following contents

IMPORT{program}="/usr/local/bin/usb-stick-uuid.sh"
ACTION=="remove", ENV{ID_FS_UUID}=="ENV{MY_UUID}", 
RUN+="/usr/local/bin/usb-removed.sh"

The program usb-stick-uuid.sh now only echo's:
MY_UUID=ff744c66-3671-447c-8fa0-d96fc6f82352
and nothing else.
But it does never match.

When i enter the uuid by hand in the rule it does work:
ACTION=="remove", 
ENV{ID_FS_UUID}=="ff744c66-3671-447c-8fa0-d96fc6f82352", 
RUN+="/usr/local/bin/usb-removed.sh"

Am i doing something wrong or is it just the way it works? I also could 
not find any example on the internet matching two ENV strings.

My system:
ubuntu 10.10
udev version 162

With kind regards

William
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