Trying to debug openUrl failing.

Question

I am trying to run the following code in the iPhone simulator:
NSString* urlString = @"launchme:12345678910";
UIApplication* thisApp = [UIApplication sharedApplication];
NSURL* testURL = [NSURL URLWithString:urlString];
BOOL success = [thisApp openURL:testURL];
However it does not launch the url. I've tried the LaunchMe example and that works. The difference between the two apps is that in mine, the _urlString property of testURL says: "Variable is not a CFString", while in the LaunchMe app it is out of scope.
I've changed the urlString to @"http://www.apple.com" and it works, so I know the problem is with trying to use the string @"launchme:12345678910". However, I don't see what is wrong with that string.
I've had this problem before, in: http://discussions.info.apple.com/thread.jspa;jsessionid=13649B06DB66E2C924EC259 928B27D39.node0?messageID=12751862&#12751862
I managed to get that version working, although I wasn't sure how. This is the same code, and I've noticed it no longer works, although I don't remember changing the code since then.

Answer 1

I just copy/pasted that code into the LaunchMe app and that works too. So it seems to be the combination of the "launchme:" url and my specific app.
The only thing I can think of that is different in my app from the LaunchMe app is that I have upgraded my app so that there is also an iPad version. I can see why it wouldn't work for the iPad version, since there is no phone capability; however I can't see why it doesn't work for the iPhone version, which is the version I am running in the simulator, since this should have phone capabilities.
Do you need to have bespoke code/configuration settings to launch a phone link after upgrading to an iPhone/iPad app?