data mismatch

Salam

this is my code

<%dim checkuser 
set checkuser=conn.execute("select firstname from customer where numm='"&request.Form("numm1")&"' and passs='"&request.form("passs1")&"'")
if not checkuser.eof then
response.cookies("acadimic")=request("firstname")
response.cookies("acadimic").Expires=date+1
%>

I have an error "Data mismatch error", numm is autonumber in the database and numm1 is a field text its type is text, passs is a text type in database but passs1 is a password type in asp, Can I find solution for this problem??