Transaction is not propagated to BMT EJB

Issue

• A standalone Java client starts a transaction (UserTransaction) then call an SLSB EJB in JBoss server.
  • When this EJB is declared as CMT with Mandatory attribute on the called method, the EJB receives the transaction created by the client.
  • When this EJB is declared as BMT, the EJB Don't receive the transaction created by the client.
• Why the BMT EJB can't receive the UserTransaction created by the standalone client ?
• Why a BMT EJB can not receive and continue a transaction