Report freezes while having 7 parameters

Hello,

I have a report with 6 parameters that works very well. When I add another parameters it freezes  in the SSRS  portal and doesn't display anything when I want to run the report .

I'm using IE 11.

How can I resolve this issue ?

This last parameter is mandatory.

I don't have a distant folder where I can put a screenshop for you to see this behaviour. I see that I cannot put it here directly

Can you give me an email address where I can send you the screenshot ?

Thanks in advance.

Best regards.