It sounds like you have not created a Sequence.
Be sure that your Sequence settings match your footage by doing this:
Or, right-click a media file and select 'New Sequence From Clip".
How do I choose the right sequence settings?
I am having the same issue when I try to drag a clip to a sequence. I'm an FCP user trying this out. This should just work, but it doesn't. I haven't seen an answer for dummies (me) yet. I just see that "it just works now"? responses.