[Serusers] Some trouble with Asterisk!

[edison]

Hi everyone:
	I am trying to setup SER and Asterisk in one box.I used SER to deal with SIP packet and used Asterisk to handle RTP packet,because I want implement Voicemail/conference/Holdonmusic and so on,in my soft swith system.I am implemented basic things seems already.But I found some big problems.
	If I let SER outbound up.The register infomation will bypass [location] table on SER.Why is happened?
	And I am confused about the relationship between SER and Asterisk?How SIP packet flow through them ?
	Thanks for reading
	Regards
																edison