asterisk users - Nov 2004 - Odd situation with Cisco 7960 IP phone

I have the cisco 7960 phone. If I call out on the phone I
can hear the person called and they can hear me.

If I have that same person and same phone call into my
asterisk box and select my extension I answer as it is ringing
then I cannot hear them speak. However, they can hear me.

I dont understand? Anyone know what I am missing.
I have 4 other sip phones on this machine (grandstream)
and they work. I also have 3 IAXY's and they work.

THanks,

Jerry