How to enable macros in a protected workbook under Office 2007

I tried one of the bypass posted here but not getting it to work?!!

I am using Windows XP, Office 2007, Mcafee Virus Scan Enterpris 8.



Create this key and set its value to 1:

ExcelBypassEncryptedMacroScan

under:

HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\E xcel\Security



Thanks,

Abdul