Hi,
Are you able to ping the inside interface of the PIX? For confirmation, please enter the command 'man i' in the config mode on the PIX and then ping the inside interface of the PIX from the client. If this works, then please check the following :
1. nat (inside) 0 configuration.
2. Access-list on the inside interface.
3. Default gateway in the inside hosts.
If you are not able to ping the inside interface then you might need 'isakmp nat-t' command on the PIX.
HTH,
Please rate if it helps.
Regards,
Kamal