I need help!

I created a status of "Awaiting response from requester" for requests

This status was created on similarity a standard status "OnHold"

In Self-Service Portal Settings I turned on "Open onhold requests upon requesters reply"

but when the request is in the status "Awaiting response from requester" and User answer the question of Technicians,  through web-form, request does not change the status to "Open". Answer via e-mail - ok!

If to use the status "OnHold" - answer via e-mail and web-form for the request status goes to "Open"

how to do that when answering through a web form, the request to change the status to open?

Please help me...