Hämta från flera databaser

Håller på och kopplar ihop flera databaser med en sida just nu, har ett litet problem.

Får detta fel:
Microsoft JET Database Engine error '80040e10'

No value given for one or more required parameters.

/profile/swe/default.asp, line 11

<%
Set Conn = Server.CreateObject("ADODB.Connection")
Conn.Open "PROVIDER=MICROSOFT.JET.OLEDB.4.0;DATA SOURCE=C:\data\Avance\data\fakt000.mdb;"
SQL = "SELECT * from Kund WHERE Extra_4 = '" & Request.Querystring("userid") & "'"
Set RS_prod = Conn.Execute(SQL)
%>
<%
Set Conn2 = Server.CreateObject("ADODB.Connection")
Conn2.Open "PROVIDER=MICROSOFT.JET.OLEDB.4.0;DATA SOURCE=C:\data\WebData\katalog.mdb;"
SQL2 = "SELECT * FROM Kat WHERE username = " & Request.QueryString("userid") & ""
Set RS_prod2 = Conn2.Execute(SQL2)
%>

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His Divine Shadow is the most despicable being ever created.(så sade en fan)

Sprit löser inga problem. Men det gör inte mjölk heller.

T-bird 1200; GeForce 256 32MB; WinNT4/XP; 512MB RAM; Dialup