You have installed SMSDOM with the option to install LiveUpdate not selected but now you would like to use LiveUpdate without having to uninstall/reinstall the product.
LiveUpdate does not work because it was not installed.
Attached to this technote is a short video that demonstrates how to do this. Also, there is a Powerpoint presentation that has all the steps along with copies of the liveupdate.conf and Product.Catalog.JavaLiveUpdate files. You can create those files manually by copy and pasting from the text from the slides.
32bit Symantec Mail Security for Domino (SMSDOM)