Hello!

On my intranet application (in operation for about 2 years) which using forms authentication, it comes suddenly, since the 02/23/2012 to following error message in IIS7.0 application log.
The implications are that javascripts can not be executed and data in the GridView not being displayed.
If the application is running on IIS7.0 server itself in IE9.0, there are no problems?
The import of the Windows security update 2638420 on the client did not help!

Event code: 4005
Event message: Forms authentication failed for the request. Reason: The ticket supplied was unvalid
Event time: 24.02.2012 11:33:58
Event time (UTC): 24.02.2012 10:33:58
Event ID: fbc541e7d6e84473bbd0b0e3c2030fe9
Event sequence: 161
Event occurrence: 78
Event detail code: 50201
Application information:    
Application domain: /LM/W3SVC/1/ROOT/skiintra-3-129745531779716796    
Trust level: Full    
Application Virtual Path: /skiintra    
Application Path: C:\Skiintranet\web\    
Machine name: SKIDATA-INTRANE

Process information:    
Process ID: 1836    
Process name: w3wp.exe    
Account name: IIS APPPOOL\DefaultAppPool
Request information:    
Request URL: http://192.168.137.2/skiintra/WSverbindung.asmx/GetDiffArtLang    
Request path: /skiintra/WSverbindung.asmx/GetDiffArtLang    
User host address: 192.168.137.16    
User:      Is authenticated: False    
Authentication Type:     
Thread account name: IIS APPPOOL\DefaultAppPool

Thanks Chris