iManager.html problem

Hi All,
After one of last update on 2 OES SLES 10 SP3 server when I try to start iManager using http://serverip/iManager.html I got error 403 Access forbidden no permission to ....
When I copied iManager.html to imanager.html I can start iManager using http://serverip/imanager.html
Anyone have similar problem ?
Regards,
Maciej