If you were using vb3 before and now vb4, there are differences in functionality, because they use two different editors.
In vb3 you could just cut and paste and it would silently copy the BBCODES -- even if you were in 'editor' mode.

In vb4 you must be in 'source'

mode in order to paste BBCODES.
Anyway, that is what I have observed, maybe there is another trick that I do not know about. Oh yeah, do what @Ozzy47 suggested, that will help too.