Hello,
Could you try checking this Article:
SEPM 12.1 RU1 Small Business Edition won't upgrade to 12.1.1 MP1 saying you are not allowed to downgrade from Enterprise Edition
http://www.symantec.com/docs/TECH189041
If that does not help, please create a case with Symantec Technical Support to receive the Latest Tool of Symantec CleanWipe.
Check these Steps below:
How to create a new case in MySymantec
http://www.symantec.com/business/support/index?page=content&id=TECH58873
Phone numbers to contact Tech Support:-
Regional Support Telephone Numbers:
- United States: https://support.broadcom.com (407-357-7600 from outside the United States)
- Australia: 1300 365510 (+61 2 8220 7111 from outside Australia)
- United Kingdom: +44 (0) 870 606 6000
Additional contact numbers: http://www.symantec.com/business/support/contact_t...
Hope that helps!!