Problem With Len() Function & Null Values

i've come across a real head-hurter. I'm looping through a recordset and
response.writing it's rows out with no problem except 1 field. The field
type is varchar and contains words like meeting, holiday, etc.

Problem is, I'm trying to render a "n/a" when the field is null as in
LISTING 1 below. My code isn't catching the null values. How can I test for
null values? I could swear I've successfully used the Len() test like below
successfully on similiar null varchar fields, but perhaps not.

Any ideas?

LISTING 1:

If Len(objRS(7)) < 1 Then
xTeamName= "n/a" ' this is problem line
Else
xTeamName = objRS(7)
End If