question regarding upgrade from pg74.215.jdbc3.jar to postgresql-8.1-407.jdbc3.jar. function does not exist appeared ??? Please help :-/

Hi,

I just upgraded my jdbc driver and fixing stuff to make it work with
the new driver. I cannot find the answer to the following one. I
tried with the old driver and everything works. With the new one that
doesn't work.

Here is the function declaration:
CREATE OR REPLACE FUNCTION usp_Comptabilite_AgeDeCompteClient(VARCHAR,
VARCHAR, DATE, BOOLEAN, BOOLEAN, INT, VARCHAR) RETURNS refcursor AS $$

Here is the error that I grabbed from the postgresql log file:

select * from usp_Comptabilite_AgeDeCompteClient(M, NULL,
2006-08-22 -0400, 1, 1, 0, NULL)

2006-08-22 18:04:27 LOG: statement: PREPARE <unnamed> AS
select * from usp_Comptabilite_AgeDeCompteClient($1, $2, $3, $4,
$5, $6, $7)
2006-08-22 18:04:27 ERROR: function
usp_comptabilite_agedecompteclient(character varying, character varying,
"unknown", boolean, boolean, character varying, "unknown") does not exist
2006-08-22 18:04:27 HINT: No function matches the given name and
argument types. You may need to add explicit type casts.
2006-08-22 18:04:27 STATEMENT: select * from
usp_Comptabilite_AgeDeCompteClient($1, $2, $3, $4, $5, $6, $7)

If I execute the statement on pgAdminIII it works: select * from
usp_Comptabilite_AgeDeCompteClient('M', NULL, '2006-08-22',
true, true, '0', NULL) ;

Any idea what is the difference between drivers that can explain this.
And of course how I can fix the problem!

Thanks for your help! It's really appreciated!
Best Regards
/David

P.S.: I traced with the debugger and I do call setDate for arg $3. I
don't understand why it's still unknow ?