[Uncle Skeleton]

I can't get services to work. I am trying to provide a service, just like in this website:
Mac Dev Center: Services Implementation Guide: Providing a Service

I copied that code to a new Cocoa app (except instead of rot13 I just NSLog the string). I copied the info.plist entry to my info.plist, replacing only "NewsReader" with my app's name "serv." That's it, then I moved my app to /Applications, ran it, quit it, and restarted the computer (core2duo imac, 10.5.8). Nothing is added to the Services menu of any other app, and running the suggested /Applications/TextEdit.app/Contents/MacOS/TextEdit -NSDebugServices com.yourcompany.serv logs nothing.

Has anyone ever managed to write a service before? What am I doing wrong?

Here's the entirety of my code:

Code:
@implementation serv

- (void) applicationDidFinishLaunching:(NSNotification *)note
{
	NSLog(@"launch");
	[NSApp setServicesProvider:self];
}

- (void)report:(NSString *)s
{
	NSLog(s);
}

- (void)simpleEncrypt:(NSPasteboard *)pboard
    userData:(NSString *)userData error:(NSString **)error {
	NSLog(@"simpleEncrypt");
	NSString *s = [pboard stringForType:NSStringPboardType];
	[self report:s];
}

@end

Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>CFBundleDevelopmentRegion</key>
	<string>English</string>
	<key>CFBundleExecutable</key>
	<string>${EXECUTABLE_NAME}</string>
	<key>CFBundleIconFile</key>
	<string></string>
	<key>CFBundleIdentifier</key>
	<string>com.yourcompany.serv</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>${PRODUCT_NAME}</string>
	<key>CFBundlePackageType</key>
	<string>APPL</string>
	<key>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleVersion</key>
	<string>1.0</string>
	<key>NSMainNibFile</key>
	<string>MainMenu</string>
	<key>NSPrincipalClass</key>
	<string>NSApplication</string>
	<key>NSServices</key>
    <array>
        <dict>
            <key>NSKeyEquivalent</key>
            <dict>
                <key>default</key>
                <string>E</string>
            </dict>
            <key>NSMenuItem</key>
            <dict>
                <key>default</key>
                <string>Encrypt Text</string>
            </dict>
            <key>NSMessage</key>
            <string>simpleEncrypt</string>
            <key>NSPortName</key>
            <string>serv</string>
            <key>NSSendTypes</key>
            <array>
                <string>NSPasteboardTypeString</string>
            </array>
            <key>NSReturnTypes</key>
            <array>
                <string>NSPasteboardTypeString</string>
            </array>
        </dict>
    </array>
</dict>
</plist>