Exchange 2010 installation issue

I'm trying to introduce Exchange STD 2010 on a Windows 2003 SBS environment so I can decommission the old server, however upon trying to install exchange 2010 I can't pass the error message attached here, can someone help me please? I did change exchange 2003 sbs to native mode, did I do something wrong? Is this error related to this change?

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jdffAsked:
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Neil RussellTechnical Development LeadCommented:
One of the best guides there is for doing what you are trying to do can be found here.

It looks like the schema upgrade has not been completed.
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Andy MInternal Systems ManagerCommented:
Are you installing Exchange 2010 onto a different server or trying to install it on the SBS 2003 server itself as an upgrade?

If the latter, I don't believe you can upgrade the version of exchange on an SBS server directly as it's part of the license and requires purchasing a new server/OS to effectively upgrade.

If it's on a new/separate server then as noted above it may be the schema that needs updating first.
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jdffAuthor Commented:
It's being installed on a new windows 2008 server, where would I go to verify the schema?
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Neil RussellTechnical Development LeadCommented:
As per the detailed instructions in the link i provided you above....

To prepare Active Directory for Exchange 2010 we need to do the following:

Insert the Exchange 2010 DVD in to the Windows 2008 Server
Open a command prompt (Start > Run > CMD)
Run D:\setup /PrepareLegacyExchangePermissions
Run D:\setup /PrepareSchema
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jdffAuthor Commented:
None of that worked, it only worked once I had SP2 installed.
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jdffAuthor Commented:
Problem solved.
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