Failed copy of working copy to server - out of date?

(running svn 1.0.3)

I have the problem where I am trying to copy my current workspace to an
personal branch area before I do an svn update and pull in the latest
trunk. The current workspace has a moderate amount of updates, deletes,
and add's but nothing too odd. I execute the command

Given a repository structure of

trunk/software
users/cwein/branches

and a workspace which is checkedout from trunk and the command

svn copy software svn://repos/users/cwein/branches/mybranch

I get a commit failed, out of date error on a file deep inside the
software hiearchy. I have modified this file but it no one has checked
in an updated version on the trunk and I know that I am based on the
last modified version. Even if an updated version exists, what prevents
me from copying to a private area?

What restrictions exist to performing this type of operation?

-- 
Chris Wein
Software Manager
Mobilygen Corp.
E-Mail : cwein@mobilygen.com
Phone  : 408-869-4035
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