ERROR: insufficient data left in message

I always get the error "insufficient data left in message" running a prepared statement via jdbc executeQuery

the java statement

 "ResultSet rs = this.updateStatement.executeQuery();"   

results in the following error message :
java.sql.SQLException: ERROR: insufficient data left in message.

the insert statement is

INSERT INTO person.person (id, lastName, readOnly, birthDay, firstName)  VALUES(DEFAULT,?,?,?,?) RETURNING id

the server LOG file says the following

2008-04-29 00:15:24 CEST ERROR:  insufficient data left in message
2008-04-29 00:15:24 CEST STATEMENT:  INSERT INTO person.person (id, lastName, readOnly, birthDay, firstName)  VALUES(DEFAULT,$1,$2,$3,$4) RETURNING id
2008-04-29 00:15:24 CEST LOG:  could not receive data from client: Connection reset by peer

i also tried this statement via the psql command line and it worked.  there is also a similar update statement that works perfect

###
 ResultSet rs = this.updateStatement.executeQuery();    
// and the record is updated
// log
2008-04-29 00:34:45 CEST LOG:  could not receive data from client: Connection reset by peer
2008-04-29 00:34:45 CEST LOG:  unexpected EOF on client connection
###

i am using Postgres 8.2 and jdbc 3.0 for 8.2 (i also tried it with jdbc 4.0 but it  did not work either).

i have no idea what the problem is - can someone help me ?

regards sepp

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