@Mohammad
I'm here to help! To troubleshoot the issue with the SIP URI not working, I'll need a bit more information. Could you please provide me with the following details?
1. The exact SIP URI you are trying to use.
2. The context in which you are using the SIP URI (e.g., making a call, receiving a call, etc.).
3. Any error messages or codes you are receiving.
4. Whether this issue has occurred before or if it's a new occurrence.
Once I have this information, I'll be able to assist you more effectively.