Creating a PostgreSQL XA-enabled DataSource

Hi,

I wanted to ask if it is possible to create a XA-enabled DataSource for PostgreSQL? When trying to use the data source I created I always get an error "Missing default user/password for data source" although I have configured all parameters (ServerName, PortNumber, DatabaseName, User, Password, Url) as "Additional Properties". DataSource Type is "XA Data Source", XADS Class Name is "org.postgresql.xa.PGXADataSource".

Thanks in advance

Sebastian