Sip Phone error - 400 Bad request

I installed red5 plugin and the SIP PHONE plugin.

But I have an issue with sparkweb…

I have this message when a user with a sip profile connect in sparkweb:

Sip Phone error

400 Bad request

please help me…

Sorry for my bad English

I don’t know why, but now i hav’ent this message but this message when I wnat call:

You do not have a SIP Phone profile

But this user is in the SIP phone mapping…

please help me…