PIX issue

Hello - can anyone spot the problem with my PIX config? I have a PC on the inside interface and I can PING it OK from the Internet. I also have a machine on the DMZ but cannot get response to PINGs. The NATting appears OK. Maybe someone already solved this one before - here's hoping anyway. TIA,Ned

Sucessful PING to Good-PC

1216: Outbound ICMP echo reply (len 32 id 1973 seq 19969) Good-PC >
123.1.1.111 > 10.10.200.111
1217: Inbound ICMP echo request (len 32 id 1973 seq 20225) 10.10.10.1

123.1.1.111 > Good-PC

1218: Outbound ICMP echo reply (len 32 id 1973 seq 20225) Good-PC >
123.1.1.111 > 10.10.200.111
1219: Inbound ICMP echo request (len 32 id 1973 seq 20481) 10.10.10.1

123.1.1.111 > Good-PC

static (inside,outside) 123.1.1.111 Good-PC netmask 255.255.255.255 0 0

******************** Failed PING to BAD_PC

1224: Inbound ICMP echo request (len 32 id 45975 seq 21249) 10.10.10.1

123.1.1.120 > BAD_PC

1225: Inbound ICMP echo request (len 32 id 45975 seq 21505) 10.10.10.1

123.1.1.120 > BAD_PC

1226: Inbound ICMP echo request (len 32 id 45975 seq 21761) 10.10.10.1

123.1.1.120 > BAD_PC

static (DMZ,outside) 123.1.1.120 BAD_PC netmask 255.255.255.255 0 0

access-list DMZ_inside permit tcp any any (hitcnt=0) access-list DMZ_inside permit icmp any any (hitcnt=0) access-list DMZ_inside permit ip any any (hitcnt=0) access-list DMZ_inside permit tcp any object-group DMZ_Network eq www

access-list inside-out permit ip any any access-list outside-in permit icmp any any (hitcnt=984)

************************* access-group outside-in in interface outside access-group inside-out in interface inside access-group DMZ_inside in interface DMZ
*********************************

ip address outside 123.1.1.1 255.255.255.0 ip address inside 172.1.0.25 255.255.0.0 ip address DMZ 192.168.1.1 255.255.255.0

******************************