Export error in SQL Server 2005

When I try to export a database this is the error I get...
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TITLE: SQL Server Import and Export Wizard
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The SSIS Runtime object could not be created. Verify that DTS.dll is available and registered. The wizard cannot continue and it will terminate.

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ADDITIONAL INFORMATION:

Unable to cast COM object of type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.PackageNeutralClass' to interface type 'Microsoft.SqlServer.Dts.Runtime.Wrapper.IDTSContainer90'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{8BDFE892-E9D8-4D23-9739-DA807BCDC2AC}' failed due to the following error:  could not be found. (Exception from HRESULT: 0x80030002 (STG_E_FILENOTFOUND)). (Microsoft.SqlServer.DTSRuntimeWrap)

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I ran a repair and it didn't fix the problem.

I tried to register the DTS.dll and got this error message:

The module "C:\Program Files\Microsoft SQL Server\90\DTS\Binn\dts.dll" was loaded but the call to DllRegisterServer failed with error code 0x80070005.