Union of African States ended in 1962.

It's not so much the failure of the AU, but rather the lack of commitment and participation from it's member states.

so far,they have been able to promote trade among member states and also maintained peace in conflict-inclined states within its jurisdiction as a continent..

morocco is not member of AU

No African country is a member of the European Union. 28 of Europe's countries are members. See the related question below.