asterisk users - Jun 2006 - I can hear only one way when I use nokia e-60 with X-lite

Hi 
   I am facing some problems in  making  calls to 
Nokia E60 ,from other sip extensions, I am able to
hear clearly  when I use the X-lite  clients , but on 
Nokia E60 , I cannot hear anything ,ie whenever a call
is made , the user who uses X-lite hears everything
what the Nokia user says , but Nokai user  cannot hear
anything at all 
		Please advice me , where I should check , the
problem , is it because of codec  selection , I did
try with other codecs like ulaw ,  the experience was
same 
                     I am using asterisk  1.2.8  on
RHEL4 
			Thanks 
 			  Joseph John 

my sip.conf contains 

[666]
; Xlite Phone
username=666
type=friend
secret=666
;qualify=no
;port=5060
;notransfer=yes
host=dynamic
context=from-internal
disallow=all
allow=alaw

[221]
;;  Nokia E-60
username=221
type=friend
secret=221
;qualify=no
;port=5060
;notransfer=yes
host=dynamic
context=from-internal
disallow=all
allow=alaw

Send instant messages to your online friends http://uk.messenger.yahoo.com