Last inserted id

Hi, I have this simple code that uses ADO to insert a row in a test table
with a serial id and a varchar,
after insert I can obtain varchar's value but I *can't* obtain id's value
of
this record. What I'm doing wrong ??
Thanks!

*Table definition:

mydatabase-# \d societats;
idsocietat | integer | not null default
nextval('"societats_idsocietat_seq"'::text)
nomsocietat | character varying(50) |
capitalsocial | double precision | default 0

*Postgres 7.1.3 under FreeBSD 4.4

*VB code

Private Sub Command3_Click()

' Dims omited
Set Cnxn = New ADODB.Connection
strCnxn = "Provider=MSDASQL.1;Persist Security Info=False;Data
Source=mysource"
Cnxn.Open strCnxn
Set rstEmployees = New ADODB.Recordset
strSQL = "societats"

rstEmployees.Open strSQL, strCnxn, adOpenKeyset, adLockOptimistic,
adCmdTable

strFirstName = Trim(InputBox("Put name:"))
rstEmployees.AddNew
rstEmployees!nomsocietat = strFirstName
rstEmployees.Update

' Show the newly added data
MsgBox "New record: " & rstEmployees!idsocietat & " " &
rstEmployees!nomsocietat

'''''rstEmployees!idsocietat returns nothing !!!!!!!!!!!!!!

rstEmployees.Close
Cnxn.Close
Set rstEmployees = Nothing
Set Cnxn = Nothing

End Sub