Evolution and spam removal how to fix?

I’ve got Evolution installed as my mail readers on two computers. Both have spamassassin and bogfilter installed. On one system I apparently set it up properly as it removes all junk and spam that I identified initially keeping all the emails I wished to received in my inbox everyone else goes to my ‘junk’ folder which is deleted. On my other computer I didn’t do this properly as everything goes to ‘junk’ folder. I have to go in and manually select those emails I want and using my mouse ( left or right) button a pop-up menu comes up and one of the options is to unselect messages as spam or junk. This is good because it sends them back to my inbox. Question: How do I get this to work without doing this all the time like the first computer that works properly. Is there a setting somewhere or command that needs to be changed?