auth connection wont work as HNI Extension but works in PHP

[digitalkaoz]

if i try to connect to a MongoServer with compiled HNI Extension (latest master of both (hhvm-extension and mongofill sources)) i always get a

Uncaught exception 'MongoConnectionException' with message 'couldn't get host info for DB

if i try it with the pure PHP Extension it works like a charm.

Anybody has a clou what might be wrong?

my connectionstring is the default format:

mongodb://user:pwd@host:port/db