After uninstalling SQL2005 from my server, which already has an instance of
SQL2000 running sp4, I have problem with adding Send Mail Task into my
package.
The error is:
Cannot load MAPI interface layer. Please make sure that semmap90.dll is
installed.
I think that dll is installed by SQL2005.
How do i re-configure so SQL DTS will use the dll from SQL2000?
I tried to re-register semmap.dll (which I think is the correct dll) but the
problem still there.
Thank you all for your help!

Tien

Go to the 80 directory that's installed with SQL Server 2000 -
(\Microsoft SQL Server\80\Tools\Binn)

Rename the semmap.dll file to semmap90.dll

My case, I needed to copy ..\Tools\Binn\semmap.dll to ..\Tools\Binn\semmap90.
dll and ..\Tools\Binn\Resources\1033\semmap.rll to ..
\Tools\Binn\Resources\1033\semmap90.rll