SmartNav script error.

Hi All,
Issue: I am running windows 2003 server service pack one. I
have deployed asp.net web application on this machine. Now when one of
my page tries to run the client scripts on this machine I am getting
http 401 error message for smartnav.js. I have added aspnet and aspnet
user account to the aspnet client folder with read and read and execute
permission. I have allowed anonymous and win authentication to
aspnetclient directory under default website directory. The problem
when i restart the iis after i see this error page works fine. But next
day same error will re appear on the page. please find the log entry i
have found using iis log analyzer:

"2006-02-27 15:05:19 W3SVC1 IPADDRESS GET
/aspnet_client/system_web/1_1_4322/WebUIValidation.js - 80 - IPADDRESS
Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET +CLR+1.1.4322;+.NET+CLR+2.0.50727)
401 1 0
"

Any help with this issue will be appreciated.

Thank you,
Nilay Patel
yalin78@gmail.com