Type Mismatch Rs In Array

I have a problem using 3 tables. The first recordset is my own invention (that means a very simple one). It reads product features from a table:

Set Rsx = Server.CreateObject("ADODB.RecordSet")
sSQL= "SELECT * from prodfeatures"
Rsx.Open sSQL, sDSN, adOpenStatic, adLockReadOnly, adCmdText

'then I read the recordset into arrays like this:

While Not Rsx.eof
i=i+1
mte(i)=Rsx("id")
' every id has a corresponding featurename
mfnavn(mte(i))=Rsx("featurename")
Rsx.movenext
Wend

'this part works very well

Now comes the difficult part that the SQLTeam figured out (this combines an order base with an itemorder base):

Set Rs = Server.CreateObject("ADODB.RecordSet")
sSQL="select oitems.catalogid,oitems.features, sum(oitems.numitems) as SumOfItems from oitems Inner Join Orders On Orders.orderid = oitems.orderid Where Orders.oshippeddate =" & dDate & " AND Orders.orderid <> 1 group by oitems.catalogid,oitems.features"
Rs.Open sSQL, sDSN, adOpenStatic, adLockReadOnly, adCmdText

'Then I write the content of the products with product features - the complexity of the sql is due to a use of many other operations:

While Not Rs.eof
response.write Rs("catalogid") & "features:" & Rs("features") & "Name:" & mfnavn(rs("features"))
Rs.movenext
Wend

The query runs, and starts well, writing 3 lines:

239 features:221 Name:Standard bil max 5m lang og 1,9 m høy
240 features:270 Name:Liggestol (gratis)
240 features:271 Name:C1 Enkeltseng i delt lugar u. bildekk. Kun vask


but it is then aborted with this message:

Microsoft VBScript runtime error '800a000d' Type mismatch: 'Rs(...)'
I know that the problematic part is the array
mfnavn(rs("features"))
...anyone with experience in this?