"Microsoft.Jet.OLEDB.4.0" has not been registered

Using OpenDataSource I run into this problem.

I have an SQL Server 2005 installed on Windows 2003 64 bit server (no itanium)
I have a 32 bit client where I run Management Studio.

This is the full detail of the error:
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Msg 7403, Level 16, State 1, Line 1
The OLE DB provider "Microsoft.Jet.OLEDB.4.0" has not been registered.
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I have tried installing a new 64bit Jet driver, but it only exists for Itanium.
How to force the system to use the 32 bit one?
I am stuck!
The is no way to use Jet driver from a 64-bit SQL Server unfortunately. They did not port the driver to 64-bit. So this would only work from a 32-bit SQL Server.|||xxx|||You can force the SQL Server Agent to execute the 32-bit version of DTExec by setting up the job as a CmdExec task instead of an SSIS package call, as detailed here:
http://wiki.sqlis.com/default.aspx/SQLISWiki/x64.html?diff=y