OpenSocialClient client= new OpenSocialClient(OpenSocialProvider.MYSPACE);
		
		client.setProperty(OpenSocialClient.Property.DEBUG, "");
		if (args.length > 0 && args[0].equalsIgnoreCase("REST")) {
		      client.setProperty(OpenSocialClient.Property.RPC_ENDPOINT, null);
		    }
		client.setProperty(OpenSocialClient.Property.CONSUMER_SECRET, "20ab52223e684594a8050a8bfd4b06693ba9c9183ee24e1987be87746b1b03f8");
		client.setProperty(OpenSocialClient.Property.CONSUMER_KEY, "http://www.myspace.com/496094792");
		
		try{
			OpenSocialPerson person = client.fetchPerson("496094792");
		} catch (org.opensocial.client.OpenSocialRequestException e) {
			System.out.println("OpenSocialRequestException thrown: " + e.getMessage());
			//e.printStackTrace();
		} catch (java.io.IOException e) {
			System.out.println("IOException thrown: " + e.getMessage());
			//e.printStackTrace();
		}

401 actually means that the request that you made is an unauthorized request and it's failing a security check.

To clarify, are you trying to create an on-site app hosted by MySpace or something hosted externally? You should also check to make sure the user you're trying to access in that sample code (496094792) either has the application isntalled (if its an on-site app) or has granted your application an access token (if its an off-site app).