The fcSDK installer checks the registry to see what version of the MDAC you have installed. It does not proceed if you have a version less than 2.7.

The registry key it checks is:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DataAccess\FullInstallVer

This solution basically follows this Microsoft KB article (301202):
http://support.microsoft.com/default.aspx?kbid=301202

Confirm the MDAC version present on the system using Component Checker: http://www.microsoft.com/downloads/details.aspx?FamilyId=8F0A8DF6-4A21-4B43-BF53-14332EF092C9&displaylang=en

Make sure at least MDAC version 2.7 or later (whichever is makes the most sense for your organization) is installed. We recommend the newest version of the MDAC with the most recent service pack.

MDAC downloads: http://msdn.microsoft.com/data/mdac/downloads/default.aspx

If after confirming/updating the MDAC is up-to-date and you are still having issues installing the fcSDK please check the following registry key for the raw version number of the MDAC present:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DataAccess\FullInstallVer

The version number present in the registry should match the version of the MDAC installed. Sadly this is not always the case.  Using the Component Checker, determine the version of the msado15.dll present on your system. Enter this version number into the registry entry above using RegEdit.

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