largeobjects deadlock ?

HI all,

I have somme problem with largeobjects setting in a preparedstatement, here
is the code with the problem in comment // :

[...]
db.setAutoCommit(false);
[...]
LargeObjectManager lobj = pgdb.getLargeObjectAPI(); //pgdb is a
PGConnection
int loid = lobj.create();
System.out.println("loid : " + loid); //this give 359648
LargeObject image = lobj.open(loid);
int s, count = 0;
byte buf[] = new byte[2048];
while ((s = affiche.read(buf, 0, buf.length)) > 0){ //affiche is an
InputStream
count += s;
image.write(buf, 0, s);
}
BlobInputStream b = new BlobInputStream(image);
addDVD.setBinaryStream(4, b, count); //addDVD is an PreparedStatement
//addDVD.setNull(4, java.sql.Types.BINARY); // --> all work well if I
decomment this and comment the preceding
image.close();
affiche.close();
[...]
System.out.println("addDVD : " + addDVD.toString()); //<stream of 6503
bytes> for the fourth prm (bytea)

int update = addDVD.executeUpdate(); // -->deadlocking here !!!
System.out.println("update = " + update); //never pass here
db.setAutoCommit(true);
[...]

Am I setting the bytea in the rigth manner ? Else, how may I do that , where
are my mistakes ?

Thx u all.

andy