how can i do this kind of redirection with pix?

i have got an idea,and made it work,but it brought another problem...

with outside nat and static,like this:

access-list nat_outside_dmz permit tcp any host 123.0.0.1 eq 8000 nat(outside) 15 access-list nat_outside_dmz outside global(dmz) 15 10.0.0.199

static (dmz,outside) tcp 123.0.0.1 8000 10.99.0.99 8000

it works like what i think:

when request to 123.0.0.1:8000 come from interface outside,it will be changed like request from 10.0.0.199:8000,and send through interface dmz.

this idea works,but normal statics does not work!!

can someone give me help? thanks