Strange Behaviour in IE7 - Javascript only refreshes dropdown once

Strange little issue. Using Javascript and AJAX to pull in a drop down box for car models when a car make is chosen. Here's what happens: if I choose Ford, the Ford models appear. I choose Honda, the Honda models appear. But if I choose Ford again - the update doesn't happen. Essentially, anything that's already been selected will not reappear.

Here are the code snippets:


Code:
---------



>> Make
Acura
Audi
BMW
... etc...

Select a Make..

---------

Code:
---------
<%
If Request("Make") & "!" = "!" Then
%>
Select a Make..
<%
Else

%>

>> Model
---------------
Undecided
<%
If Request("Type") = "New" Then

sql = "Select * From New Where Make = '" & Request("Make") & "';"

Else

sql = "Select * From Used Where Make = '" & Request("Make") & "';"

End If

rs.open sql, conn

Do Until rs.EOF
%>
"><%=rs("Model")%>
<%
rs.movenext

Loop

rs.close
%>

<%
End If
%>
---------
Your thoughts on why this is happening are most appreciated!

Cheers..
Drew

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