blob setBinaryStream

Do you need to create a transaction to set blobs?
con.setAutoCommit(false);
FileInputStream fis = new FileInputStream(file);
PreparedStatement ps = con.prepareStatement("update=
userpreferences set image='?' and time=? where user='?'");
Logger.log("Setting Binary Stream");
ps.setBinaryStream(1, fis, length);
ps.setInt(2, (int)new java.util.Date().getTime());
ps.setString(3, user);
ps.executeUpdate();
ps.close();
fis.close();
con.commit();
con.setAutoCommit(true) ;

When Set Binarystream calls the setInt method, it throws a
SQLExceptionParameter index out of range.
Does anyone know what this could be?