Failure to create entity bean with CMP2 under JBOSS + Postgresql

Question

I have written a simple jsp programme using JBOSS 4 DR2 with postgresql 7.3.3 whereby a simple entity bean could be created into a table in the postgresql 7.3.3 table. However I kept getting the exception message [ javax.ejb.CreateException :Erro checking if entity exists:java.sql.SQLException: ERROR:parser:parse error at or near "=" at character 39 ]
I have even examined the logfile created under the cygwin postgresql , the log output record produce the error FATAL : unsupported frontend protocol ,with next line read [ERROR:parser:parse error at or near "=" at character 39 .
I have no idea why this is happening? The postgrsql 7.3.3 was run under cygwin using the command: pg_ctl start _D {data directory} -l logfile -o "-p 5432"
My guess is that this may not be the Jboss-postgresql data source configuration error since I am able the verify the existence postgresql jndi ,datasource and connector service under the jboss console.Somehow it just got something to do with the jsp programme in the way it was written may be ? But it should not pose a great problem, since i am trying to create a simple entity bean only.
By the way the entity bean creation statement is home.create("123"),to further verify that the home & remote interface was working ,I have the object context printed out before the creation, and it appeared OK.
Thanks in advance for those willing to help me to resolve the issues

Answer 1

I have managed to get the debug from the postmaster , it all boils down to the query [SELECT COUNT(*) FROM {TABLE} WHERE ={CMP FILED}="123"] , the = sign after the 'WHERE' responsible for the failure , but I am still puzzle why it would happen as such?
Any helper ?
Thanks