IAIS 04 Recognizer Failed: Got error response HTTP 403

I just have one problem when I try a Speech Recognizer, I have no problem when my speech sensitivity is lower than 03, but when the sensitivity is higher than 0.3, an error occurs.
When I read at the report, I can see this:

"DEBUG: Starting computation: 8fc75e5a34c49d16
WARN: Got error response HTTP 403 for: …8fc75e5a34c49d16 "

Do you know how I can fix this problem?

Thanks by advance

I can reproduce this problem. The report also contains the following line (somewhere in the xml of the response message):
description=“Speech sensitivity parameter, …” … error=“Number must be between 0.0 and 0.03”
which, I guess, means that 0.03 is actually the largest accepted value. The user interface that allows to select a value between 0.0 and 1.0 is most likely wrong. So sticking to the value of 0.03 is the only thing you can do to avoid this problem.