You go to a normal NAM software download area (where you are getting upgrades), and there is a link "Cryptographic Software for NAM". Download the cryptographic patch, matching your main software, and install in the normal mode.
Good luck,
Mike
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CCNP, CCDP, CCVP, CCSP, MCSE+I, Sun SCSP.
http://www.headsetadapter.com