The number of arguments provided is different

Hello,

We use a addon for our warehouse. With this we can see the track and trace code on a website. Yesterday the site gave an error (you are using an old browser).

Since ax always uses IE7 as browser  version we added a fix. 

We added the following registry key to the users computer:

Key Path: Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION
Value type: Ax32.exe
Value data: 11001 (Decimal)

Now we have a problem with sending email from the client (Email templates):

The number of arguments provided is different from the number of arguments accepted by the method.

So probably the client now sends an extra argument with the registry fix. 
Someone knows a fix for this?

Thanks in advance.

Regards,

Jaap