Problem with updating

Hi, I was doing the guestbook asp tutorial available on this site and everything worked fine up until I tried to do the updating section. I have made a few cosmetic changes but nothing major. I can select the entry I wish to update and fill in the form stating what I want it changed to but when I try to submit it I get the following error:

ADODB.Recordset (0x800A0CB3)
Current Recordset does not support updating. This may be a limitation of the provider, or of the selected locktype.

The piece of code in question looks like this.
'Update the record in the recordset
rsUpdateEntry.Fields("Name") = Request.Form("name")
rsUpdateEntry.Fields("Surname") = Request.Form("surname")

I'm running this with an access database on a windows 2000 machine.
I'm not realy into programming but if anyone can suggest something that isn't too technical I'd really appreciate it.

I'm not really sure what you mean, but then again I know nothing about ASP, I only started using it on Monday. This is all of my code for that page. It should give you abetter idead of what I was doing then I could.

<% 'Dimension variables
Dim adoCon            'Holds the Database Connection Object
Dim rsUpdateEntry   'Holds the recordset for the record to be updated
Dim strSQL             'Holds the SQL query to query the database
Dim lngRecordNo      'Holds the record number to be updated

'Read in the record number to be updated
lngRecordNo = CLng(Request.Form("IDNum"))

'Create an ADO connection object
Set adoCon = Server.CreateObject("ADODB.Connection")

'Set an active connection to the Connection object using a DSN-less connection
adoCon.Open "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath("tester.mdb")

'Create an ADO recordset object
Set rsUpdateEntry = Server.CreateObject("ADODB.Recordset")

'Initialise the strSQL variable with an SQL statement to query the database
strSQL = "SELECT tblNames.* FROM tblNames WHERE IDNum=" & lngRecordNo

'Set the cursor type we are using so we can navigate through the recordset
rsUpdateEntry.CursorType = 2

'Open the recordset with the SQL query
rsUpdateEntry.Open strSQL, adoCon

'Update the record in the recordset
rsUpdateEntry.Fields("Name") = Request.Form("name")
rsUpdateEntry.Fields("Surname") = Request.Form("surname")

'Write the updated recordset to the database
rsUpdateEntry.Update

'Reset server objects
rsUpdateEntry.Close
Set rsUpdateEntry = Nothing
Set adoCon = Nothing

'Return to the update select page in case another record needs deleting
Response.Redirect "update_select.asp"
%>

Excellent that worked, thanks a lot.