mit felt er tomt øhh?

Jeg får en fejl når jeg prøver at gemme nedenstående. feltet rsaddcomment("kilometer") er tomt når jeg prøvet at lave en response.write på det! Der står noget i basen, men jeg harpå fornemmelsen at der er noget galt i mit kald?

<%
'Dimension variables
Dim adoCon          'Holds the Database Connection Object
Dim rsAddComments  'Holds the recordset for the new record to be added
Dim strSQL          'Holds the SQL query to query the database

'Fjerner mellemrum og specille tegn fra felterne.
strBil              = Trim(Replace(replace(Request.Form("bil"),"'",""),"<","&lt;"))
strKilometer            = Trim(Replace(replace(Request.Form("kilometer"),"'",""),"<","&lt;"))
strLiter            = Trim(Replace(replace(Request.Form("liter"),"'",""),"<","&lt;"))

'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("bildata.mdb")

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

'Initialise the strSQL variable with an SQL statement to query the database
'strSQL = "SELECT * FROM bildata;"
'strSQL = "select top 1 * from bildata where bil = '" & strBil & "' order by int(kilometer) desc"
strSQL = "select top 1 * from bildata where bil = '" & strBil & "' order by id desc"
'response.write strsql

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

'Set the lock type so that the record is locked by ADO when it is updated
rsAddComments.LockType = 3

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

response.write ("strkilometer")
response.write strkilometer
response.write ("rsaddcomments")
response.write rsAddComments("kilometer")
response.write ("Liter")
response.write strLiter

forbrug = (int(strKilometer)-int(rsAddComments("kilometer")))/strLiter



'Tell the recordset we are adding a new record to it
rsAddComments.AddNew

'Add a new record to the recordset
rsAddComments.Fields("bil")                  = Strbil
rsAddComments.Fields("kilometer")             = Strkilomter
rsAddComments.Fields("liter")                 = Strliter
rsAddComments.Fields("forbrug") = round(forbrug,2)
'rsAddComments.Fields("forbrug")             = FormatNumber(forbrug,2)

'Write the updated recordset to the database
rsAddComments.Update

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

'Redirect to the guestbook.asp page
Response.Redirect "graf3.asp"
%>