Error when trying to install putty

[Giuseppe Tumminia]

I have installed the following:
Xcode Version 4.6.3 (4H1503)
MacPorts 2.1.2
Latest XQuartz

My system info is:
System Version:OS X 10.8.4 (12E55)
Kernel Version: Darwin 12.4.0

I followed this steps:
http://www.codingsteps.com/installing-and-using-putty-on-mac-os-x/

at the end when i type:

sudo port install putty

I get this message:

{{{
Error: Unable to execute port: Could not open file:
/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/security/putty/Portfile
}}}

What am I doing wrong?
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