Function of clipboards in adding lyrics

I have just purchased Composer 2.5.2 and read the User Guide (which is excellent!). I am trying to add lyrics to a internet midi which I have opened in Composer. The lyrics are from a a Notepad file in my XP/documents. I am trying to use the copy/paste procedure described in secs 5.1.6 and 6.2.7(importing the Notepad lyrics into the midi score in Composer) After many attempts I did partially succeed once, but have not been able to do it again. I think the problem is that I do not understand what the windows and Composer clipboards do, how and where they do it, or how I find them. I have copied/pasted many times in other documents, but have never been aware that clipboards have anything to do with it. I seem to have become involved in windows Word, which I never use I do not want to have any involvement with windows unless I have to. Will appreciate any help as I am dead in the water now. Thanks.