windows phone 8.1 browser

OS: windows phone
Version: 8.1
Browser IE 11

Hello,
I have some problems with windows phone browser 8.1. My website is not shown on windows phone 8.1 since I updated from Version 8.0
first example:
http://www.virtic.care/kunde/v1/web/main/m.p
smartclient version: "v9.1p_2014-10-05/Pro Development Only"
second example:
http://www.virtic24.com/sm/vtimea.p
smartclient version: "v9.1p_2015-03-28/Pro Deployment"
third example:
http://smartgwt-mobile.smartclient.com/#Widgets
smartclient version: unknown.

When I switch to desktop mode some widgets are shown but the page still does not work
In VisualStudio phone emulator the pages do work and they also do in the desktop version.

Kind regards

Paul