Firstly, it would help if you post in the correct forum location for help with your issue, that aside the link at
http://support.microsoft.com/kb/918992/en-us
does not apply to your scenario in any way and could cause confusion.
You need to follow this link
http://support.microsoft.com/kb/246133
and use method 1 to transfer the logins
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"Ya can't make an omelette without breaking just a few eggs" 😉