Getting error in console but don't know where the code is?

Getting error in console but don't know where the code is?

I'm trying to follow the steps on this website:
http://apcmag.com/getting-started-with-medroid.htm
to create a HelloAndroid application. However, instead of using the
virtual device I want to use my s3. I put the s3 in usb debugging mode and
made sure the run config had it selected.
My problem is that when I run it, it gives me this error, which is the
same error I got from a completely different and totally unrelated
project:
[2013-09-05 21:18:02 - google-play-services_lib]
------------------------------
[2013-09-05 21:18:02 - google-play-services_lib] Android Launch!
[2013-09-05 21:18:02 - google-play-services_lib] adb is running normally.
[2013-09-05 21:18:02 - google-play-services_lib] No Launcher activity found!
[2013-09-05 21:18:02 - google-play-services_lib] The launch will only sync
the application package on the device!
[2013-09-05 21:18:02 - google-play-services_lib] Performing sync
[2013-09-05 21:18:08 - google-play-services_lib] Uploading
google-play-services_lib.apk onto device 'd20eb13c'
[2013-09-05 21:18:08 - google-play-services_lib] Installing
google-play-services_lib.apk...
[2013-09-05 21:18:15 - google-play-services_lib] Re-installation failed
due to different application signatures.
[2013-09-05 21:18:15 - google-play-services_lib] You must perform a full
uninstall of the application. WARNING: This will remove the application
data!
[2013-09-05 21:18:15 - google-play-services_lib] Please execute 'adb
uninstall com.google.android.gms' in a shell.
[2013-09-05 21:18:15 - google-play-services_lib] Launch canceled!
I'm not even using google-play-services! I'm just trying to run that
helloworld app on my phone.