ASA5505 port forwarding

I'm trying to configure the ASA for internet access to our phone server.  These are the lines I'm trying to input.
object network obj-phone-server
host phone-server
nat (inside,outside) static interface service tcp 80 80

I'm getting this
phone-server(config)# nat (inside,outside) static interface service tcp 80 80
ERROR: % Invalid input detected at '^' marker.

What is wrong?

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Benjamin Van DitmarsSr Network EngineerCommented:
What version IOS are you using looks like youre 8.3 or higher. if so cisco changed the way of write
nat rules. it now like this

nat (inside,outside) static interface service tcp www www
access-list outside_in extended permit tcp any object obj-phone-server eq www


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Pete LongTechnical ConsultantCommented:
The error is pointing to the interface name?

Is your outside interface called outside (all lower case)?
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