I have implemented the iframe with an url attribute. This url is a link to MRS. This link is without a login. When I open (for the first time) the screen with the iframe in IE, I will see an 404 error for 5/10 seconds. Then the report will appear. The second time, I don't see the error. When I open the report in firefox I see loading which is much better than the error. Is there a possibility to fix this? Maybe influence loading time?