dato che devi solo avere il nome del file ...

a.asp
codice:
<html>
<head>

</head>

<body>
<form action="b.asp" method="post" name="form1">
<input type="file" name="file">
<input type="submit" name="Submit" value="Invia">
</form>

</body>
</html>
b.asp
codice:
<%@LANGUAGE="VBSCRIPT"%>
<%
response.write(request.form("file"))
%>