Hi,
I try to use the transactionmanagement from client like the manual says :

InitialContext ctx = new InitialContext();
 tx = (UserTransaction) ctx.lookup("UserTransaction");
 tx.begin();
 ...

That works realy fine. But when I am connected to an user defined provider

java.util.Hashtable env = new java.util.Hashtable();
 env.put( Context.PROVIDER_URL, "myserver:1199");
 InitialContext ctx = new InitialContext(env);
 tx = (UserTransaction) ctx.lookup("UserTransaction");

it fails (at lookup) with following exception:

javax.naming.CommunicationException: Failed to connect to server mydefaultserver:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server 172.30.1.22:1099 [Root exception is java.net.ConnectException: Connection timed out: connect]]

 at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:213)

 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1187)
...

Is there any solution for this problem ?

I think the problem is in org.jboss.tm.usertx.client.ClientUserTransactionObjectFactory:

static private UserTransaction getUserTransaction()
 {
 if (userTransaction == null) {
 // See if we have a local TM
 try {
 new InitialContext().lookup("java:/TransactionManager");

 // We execute in the server.
 userTransaction = ServerVMClientUserTransaction.getSingleton();
 } catch (NamingException ex) {
 // We execute in a stand-alone client.
 userTransaction = ClientUserTransaction.getSingleton();
 }
 }
 return userTransaction;
 }

because a new InitialContext will be created.

TIA
Dirk