Placeholder for clientside charts appears

Dear community members,

we currently get a strange result when running a DesignStudio 1.4 Application on BOE: Instead of the Charts we receive a button titled "placeholder for clientside Charts":

Does anyone know why this happens?

Is Javascript not being executed? Does BOE recognize a wrong browser Version?

Some more Background:

This happens while we are trying to execute the URL of a DesignStudio Application programmatically, i.e. we perform a Login to BOE, add the serialized session to the URL and then execute it via a WebBrowser Control.

Thanks for all your Input!

Thilo