Sicf error pages in Sharepoint IFrame

Hi all,

I have an FPM application embedded in a Sharepoint IFrame.

I configured a custom HTML in the sicf service of my application in order to catch the errors.

If I call the application in browser, out from IFrame, then the custom HTML is shown correctly.

If I call the application in my Sharepoint IFrame, then the IFrame is simply blank.

Is there a reason for display blank page in Iframe instead of my custom HTML? Is Sharepoint filtering my error page?

Thanks,

Francesca