VBA ADO Command Date Parameter Not Working

Hello,

I'm using the PSQL-ODBC driver from Excel 2002 VBA with a ADO Command
object.  What is the correct way to pass a date into a parameter so it
gets into the database correctly? - everything I've tried results in
1900-05-07 added to the DB instead of the correct date. I also get
1900-05-07 in the DB if I leave the date empty.  I've simplified my code
into the following test case - I've had no problems with other data
types.  I've already tried changing adDBDate, passing Date objects or
strings.

Thanks,
Josh

Sub TestDateInsert()
     Dim conn As ADODB.Connection
     Dim cmd As ADODB.Command

     Set conn = New ADODB.Connection
     conn.Open "DSN=PRHTest"

     Set cmd = New ADODB.Command
     cmd.ActiveConnection = conn
     cmd.CommandType = adCmdText
     cmd.CommandText = "INSERT INTO test_table (test_date) VALUES (?);"
     cmd.Parameters.Append cmd.CreateParameter("@test_date", adDBDate,
adParamInput, , #11/23/2009#)
     cmd.Execute , adExecuteNoRecords

     Set cmd = Nothing
     conn.Close
     Set conn = Nothing

End Sub

Database Table definition:

CREATE TABLE test_table (
    test_date date NOT NULL
);

 From psqlodbc.log

[0.000]Driver Version='08.04.0100,200907060001' linking 1400 static
Multithread library
[0.000]Global Options: fetch=100, socket=4096, unknown_sizes=0,
max_varchar_size=255, max_longvarchar_size=8190
[0.016]                disable_optimizer=0, ksqo=1, unique_index=1,
use_declarefetch=0
[0.016]                text_as_longvarchar=1, unknowns_as_longvarchar=0,
bools_as_char=1 NAMEDATALEN=64
[0.016]                extra_systable_prefixes='dd_;', conn_settings=''
conn_encoding=''
[0.578]    [ PostgreSQL version string = '8.3.8' ]
[0.578]    [ PostgreSQL version number = '8.3' ]
[0.578]conn=03044168, query='select oid, typbasetype from pg_type where
typname = 'lo''
[0.594]    [ fetched 0 rows ]
[0.594]    [ Large Object oid = -999 ]
[0.594]    [ Client encoding = 'UTF8' (code = 6) ]
[0.594]conn=03044168,

PGAPI_DriverConnect(out)='DSN=PRHTest;DATABASE=prhtest;SERVER=localhost;PORT=5432;UID=xxx;PWD=xxxxxxxxxxx;SSLmode=disable;ReadOnly=0;Protocol=7.4-1;FakeOidIndex=0;ShowOidColumn=0;RowVersioning=0;ShowSystemTables=0;ConnSettings=;Fetch=100;Socket=4096;UnknownSizes=0;MaxVarcharSize=255;MaxLongVarcharSize=8190;Debug=1;CommLog=1;Optimizer=0;Ksqo=1;UseDeclareFetch=0;TextAsLongVarchar=1;UnknownsAsLongVarchar=0;BoolsAsChar=1;Parse=0;CancelAsFreeStmt=0;ExtraSysTablePrefixes=dd_;;LFConversion=1;UpdatableCursors=1;DisallowPremature=0;TrueIsMinus1=0;BI=0;ByteaAsLongVarBinary=0;UseServerSidePrepare=0;LowerCaseIdentifier=0;XaOpt=1'
[5.750]conn=03044168, query='INSERT INTO test_table (test_date) VALUES
('1900-05-07'::date);'
[7.203]conn=03044168, PGAPI_Disconnect