dkraatz on "csharp-driver Slow on Natve support port 9042"

I have a 2 node single data center. I am using the csharp driver. When we had it 1 node 1 DC it was fast. now that we have expanded it to a 2nd node it works but it is very slow responding.
_cluster = Cluster.Builder()
.AddContactPoints("connection1",""connection2")
.WithCredentials("user", "********")

.Build();

// _cluster = Cluster.Builder().AddContactPoint("connection1","connection2")
//.WithCredentials("user","*******")
//.WithoutRowSetBuffering().Build();

_session = _cluster.Connect("SE");

return _session;

anyone else experiencing this issue?