have you installed the patch for bug ID CSCto46927, yet?
the details form the Bug Tool Kit:
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Psu support changes from CCO to SPRIT
Symptom:
After the 16th of June 2011 LMS will no longer be able to download Software and Device Package updates, or PSIRT and End of Sale/Life information from CCO
Conditions:
Hosted services in Cisco.com that are being leveraged by LMS, for downloading the latest Software and Device Package updates, as well as the PSIRT and End of Sale/Life information are being migrated to a new framework and the old services will be retired.
This will affect all LMS 3.x and 4.x versions.
Refer to https://supportforums.cisco.com/docs/DOC-16806 for more information
Workaround:
Users of LMS 3.2.1 , 4.0 should install the patch that can be downloaded from cisco.com
Users of earlier version will need to upgrade to LMS 3.2 and then install the LMS 3.2 SP1 patch set before installing the patch
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the patch cwcs33x-win-CSCto46927-1.zip can be downloaded here