Login Process Error

I have created 2 tables on my db. one is for customers and one for corporate. this is to distinguish the records so that we wont mix up our clients. i have created a login page for both customer and corporate. however, i think there is something wrong with the login process code which process the login for users to our page. there is an error message:Error Type:

Provider (0x80020005)
Type mismatch.

(see highlight in red) for attached code.i am not sure if its correct but here is the code as attached

<%
Response.Buffer = True
strUserName = Request.Form("User_Name")
strPassword = Request.Form("User_Password")
Dim rs
Dim sqlStr
Dim record_found
record_found = 0
Dim vPath, pPath, ConString
vPath = "xxxxx.mdb" 'use this one if database is in root of cart folder
pPath = Server.MapPath( vPath )
ConString = "PROVIDER=MICROSOFT.JET.OLEDB.4.0;DATA SOURCE=" & pPath & ";" & "JET OLEDB:"
Dim Conn, rsCatalog
Set Conn = Server.CreateObject("ADODB.Connection")
Conn.Open ConString
sqlStr1 = "SELECT * from Customer WHERE User_Name = '" & strUserName & "' AND User_Password = '" & strPassword & "'"
sqlStr2 = "SELECT * from Corporate WHERE User_Name = '" & strUserName & "' AND User_Password = '" & strPassword & "'"
set rs = Server.CreateObject ("ADODB.Recordset")
adOpenStatic = 3
rs.CursorType = adOpenStatic
rs.Open sqlStr1, sqlStr2, conn
If (rs.RecordCount <= 0) Then
Response.Redirect("login.asp?from=no_record")
Else
record_found = 1
Response.Cookies("User_Name") = rs("User_Name")
Response.Cookies("User_Password") = rs("User_Password")
Response.Cookies("Login") = 1
Response.Cookies("View_Cart") = 0
End If
rs.Close
Set rs = Nothing
if record_found = 1 then
if Request.Form("hiddenVal") = "view_cart" then
Response.Redirect("view_cart.asp")
else
Response.Redirect("default.asp")
end if
end if
%>