Which options are required to make UniDAC work properly with AlwaysOn SQL Server?

If I'm correct options related to AON are:

-Provider (should be  set prNativeClient)

-FailoverPartner,

-MultiSubnetFailover

We are running UniDAC (version 9.1.1) and our client have a problem where our app start to fail with "Unspecified error" whenever DB switch between servers.

When that happens app need to be restarted to star working correctly.