"Find my iphone" doesn't work but "Maps.app" works

Here is my problem: (I have iPad 2 32 GB wi-fi only)

1. "Find My iPhone" cannot locate my ipad (I have "No location available" alert)
2. Google app can not find my ipad's location.
But
3. Maps app can find my location.
3. If I open google maps from Safari, it can find my location.

My Location services is on,
Settings>Mail etc.>Mobile me has "find my iPad" on
*I did reset my iPad many times
*I did reset my wi-fi many times
*I did Airplane on-off-on thing
*I reseted network settings in settings>general>network

*Nothing wrong with my date
*wi-fi connection is on (I connect to internet)
*Location services is on
*Find my iphone enabled
*I live in a country where this feature is allowed (Find my iphone can find my iphone)


So what is wrong?
Why "find my iphone" and "goggle app" is not finding my iPad while
"maps app" and "google maps" (connected through Safari) is working?

Any ideas?

 

Thnx but I couldn't find anything useful there...