Multiple servers (no replies)

Hi

Im tryng to connect to a galera cluster using a connection string like this:

server=serv1, serv2;User Id=username;password=pass;Persist Security Info=True;database=Test

And i get an exception

No such host is known

It seems its tryng to connect to a server named "serv1, serv2"

I have tested the individual servers separately and it works fine, I have used several 6.x versions and all fail.

Can somebody help me?
Thanks in advance