sudo port -Rdu upgrade installed (Automated)

[Charlse Darwin]

Need a launchd daemon to automate the upgrade process. I've the  
following but for some reason it's stopped working. Also I would like  
it to right the results into a log file.

--------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http:// 
www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Label</key>
	<string>com.macports.upgrade-outdate</string>
	<key>ProgramArguments</key>
	<array>
		<string>/opt/local/bin/port</string>
		<string>-u</string>
		<string>upgrade</string>
		<string>installed</string>
		<string>-Rud</string>
	</array>
	<key>StartCalendarInterval</key>
	<dict>
		<key>Hour</key>
		<integer>0</integer>
		<key>Minute</key>
		<integer>40</integer>
	</dict>
</dict>
</plist>
--------------------------
Thanks in advance