[Serusers] Rewriting "To" uri

Hi, Can some one tell me if its possible to rewrite the To uri in ser. I am forwarding the request from SER to openSBC which is expecting the same Request URI and To URI fields. So the SBC is looping back the call to SER. Can some give me some pointers to solve this issue. Regards, Geethanjali The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com