cannot download or open file using IE 11

Hi

Our company using IE 11 for all computers. I am running IIS 7.5 intranet local Web sites. I am rewriting  access to NET Framework.We have a lot of Reports. I am Using a built in Report Wizard in Visual studio 2010 has works in any web browser expect IE 11.The Web page get loaded OK.I click icon Export (Excel,PDF,Word)  than another window open asking (Open, Save,Save as) If I click Open I get blank page without any errors, If I click 'Save' , 'Save as' the generated file is not saved, I get no errors. This behavior is only with IE 11.Unfortunately I cannot use any other  web browser then latest IE in my company.

I attached foto

Thanks for any suggestion Henry