Solution : https://service.sap.com/sap/support/notes/547817 (SAP Service marketplace login required)
Key words : 
iks_loglevel = low iks_loglevel = medium iks_loglevel = high, execute command 'net start w3svc', caution storing logging information means, day dd-mm-yyyy, execute command 'kill inetinfo', microsoft internet service manager, configuration parameter 'iks_loglevel', internet knowledge server, iks web site, directory /sapkw/sapkw_config
Related Notes : 
       
| 608369 | IKS Patches KW 5.2 / 6.0 | 
| 592907 | Importing IKS patches | 
| 400874 | KW 5.1: Corrections for the IKS |