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" Sorry but this website doesn't work on IE "

Hello there,

I wanted to add this kind of sentence for a client when his site is loaded with IE. (lot of flex :))
I already found this topic : Internet Explorer URL Forwarding
but it doesn’t seem to work for me (i’m probably doing bad…)
I tried on my wip own site, here is the link :
and here a screenshot of my custom code.

Any ideas ?
Many thanks,