You cannot roll back by just changing the integer, you need to specify the build you are actually using.
If you are building the google play services project, you would use this line in your manifest so that the build number is generated dynamically.
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
That being said, you still need to make sure the version you are building is an version older than the one you are having problems with.
Here is a good article on how to build using a project:
http://hmkcode.com/adding-google-play-services-library-to-your-android-app/
However, if you are copying a previously built library, then you must reference the correct library in the properties of your project. Please check your settings for Eclipse / Android Studio to make sure you have added the older library. You should still use the dynamic value for the integer in your manifest, but if you insist on using a static value, you can find the integer value of the library in google-play-services_lib/res/values/version.xml