SAP BPC : Windows 8.1 and Internet Explorer 11

HI,

my boss has Windows 8.1 and Internet Explorer 11.

Problem with Internet Explorer version 11 :

• he can't load the web application with this version.

Problem With Firefox :

• he load the web application , but he can't open the excel input form from the process

The epm add in is installed and works fine on the microsoft office excel 2013.

I had install :

1. Microsft XML parser 6.0 sp1
2. Microsft WSE 3.0
3. Microsoft.NET framework 4.0

I will appreciate any suggestions...

Thanks