Session Time out error in app in ipad

Hi friends,

I am facing session time out error in Ipad bo app (I am looking dashboard in this). I increased time in E:\Program Files (x86)\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\warfiles\webapps\BOE\WEB-INF file. But still I am facing the error. Do I need to increase  the time for webservices? If yes plz tell me the steps to increase.

I am using IDT as my source. Bo 4.1 sp1

Plz find screenshots bellow...

Thanks

Riaz