opensearch issue on Edge

Hello,

i noticed that my website is no longer found by Edge, with the opensearch protocol.
I don't know why because few month back, when i implemented that founction everything was ok.
If i go to google, wikipedia, yahoo... edge find the opensearch file and i can add them as defaut search engine.

Here is my file :

<?xml version="1.0" encoding="UTF-8"?>
<OpenSearchDescription xmlns="http://a9.com/-/spec/opensearch/1.1/">
    <ShortName>mywebsite</ShortName>
    <Description>mywebsite</Description>
    <InputEncoding>UTF-8</InputEncoding>
    <LongName>mywebsite</LongName>
    <Language>*</Language>
    <Image height="32" width="32" type="image/x-icon">http://www.mywebsite.com/search/favicon.ico</Image>
    <Url rel="results" type="text/html" method="get" template="http://www.mywebsite.com/search/index.php?a=web&amp;q={searchTerms}&amp;fr=opensearch"/>
    <Url rel="suggestions" type="application/json" template="http://www.mywebsite.com/search/index.php?a=web&amp;q={searchTerms}&amp;output=fxjson&amp;fr=opensearch"/>
    <Url rel="self" type="application/opensearchdescription+xml" template="http://www.mywebsite.com/search/OpenSearch.xml"/>
</OpenSearchDescription>

And i have this in my header :
<link rel="search" type="application/opensearchdescription+xml" title="mywebsite" href="http://www.mywebsite.com/search/OpenSearch.xml" />

I'tried a lot of files but still the same problem.
And also the method to erase the files with regedt32.

That works on firefox by the way.

If someone can help me with that i'm stuck...
Also am i obligated to use https for the url inside the opensearch file ?

Thanks.
Regards.