old ports install problem

[mysiar]

I need to have tclx, tcl and tk at the same version.
latest tclx in macports 8.4.1

I tried to install old ports as per instruction here
https://trac.macports.org/wiki/howto/InstallingOlderPort <https://trac.macports.org/wiki/howto/InstallingOlderPort>

tcl ver 8.4.1 - revision 4163
tk ver 8.4.1 - revision 1334

using subversion method
step 1:
	svn co -r 4163 http://svn.macports.org/repository/macports/trunk/dports/lang/tcl
step2: 
	cd tcl
step 3:
	sudo port install 
and I got error:
Can't map the URL 'file://.' to a port description file ("can't read "portname": no such variable").
Please verify that the directory and portfile syntax are correct.
To use the current port, you must be in a port's directory.

the same problem is with tk 
svn co -r 1334 http://svn.macports.org/repository/macports/trunk/dports/x11/tk <http://svn.macports.org/repository/macports/trunk/dports/x11/tk>


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