python-setuptools unmet dependency

[Nagarjuna Asam]

When I try to install python-setuptools from apt-get using
> sudo apt-get install python-setuptools
I get python-setuptools : Depends: python-pkg-resources (= 3.3-1ubuntu1) but 3.3-1ubuntu2 is to be installed
But I already have python-pkg-resources 3.3-1ubuntu2

Error message is:
> sudo apt-get install python-setuptools
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 python-setuptools : Depends: python-pkg-resources (= 3.3-1ubuntu1) but 3.3-1ubuntu2 is to be installed
E: Unable to correct problems, you have held broken packages.

Also
> sudo apt-get install --upgrade python-pkg-resources
Reading package lists... Done
Building dependency tree
Reading state information... Done
python-pkg-resources is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

[Nagarjuna Asam (nagarjun-asam)]

This problem got solved when I changed from Japan server to main server. ??