What's the latest version of Google Play Services compatible with FlurryAnalytics 5.5?

In an Android Studio project, I am trying to use FlurryAnalytics 5.5 with Google Play Services 7.5.0. They compile, but one thing doesn't work: although FlurryAgent is recording my custom events, it never seems like they are sending them to the server.

That is, I see a lot of log messages like these:

• FlurryAgent: Re-session for context ...
• FlurryAgent: Number of events started ...

After my application is placed in the background image, although I can see this in the log:

• FlurryAgent: End of speculation

I never see this in the log:

• FlurryAgent: Analytics message sent

So Flurry info never makes it from my app to Flurry servers.

I've tried other versions of the Google Play Services library since Flurry 5.5, but the last one I can find, which seems to allow the Flurry event data to do this on the server:

• com.google.android.gms: play-services: 6.5.87

I would rather use:

• com.google.android.gms: play-services, plus: 7.5.0

because I would also like to use the latest google cloud messaging services.

So - is there a way to use Flurry 5.5 (or any other Flurry version) with Google Play Services 7.5.0 and actually see the data flow to Flurry's servers? What am I doing wrong?

Thank you.