SQL - Updating Empty Text Field Is Enterring -1

I'm trying to do a simple update like I have done countless times
before.

However, when I update the empty fields in this table it places a -1
into the field rather than the enterred value.

It is indexed with duplicates allowed. It says that zero lenght is
set to yes.

What can I do about this?


if Request.form("ouserid") <> "" Then
var2 = " and userid = '" & Request.form("ouserid") & "' "
Else
var2 = " and userid is null "
End if
if Request.form("orepid") <> "" Then
var1 = " repid = '" & Request.form("orepid") & "'"
Else
var1 = " repid is null "
End if

"Update [Website Settings] set userid = '" & REquest.form("userid") &
"' and repid = '" & Request.form("repid") & "' where " & var1 & var2
& var3


Thanks!