Piper's ears didn't stand until she was I think 5 months old.
As far as taping, something the breeder did for my GSD (that I also did for Piper) was after you tape the two ears, tape the ears together, almost like a handle.
I'm not sure if this is the proper thing to do, but it worked for Piper.
Here is a link that shows kind of what I mean-
Google Image Result for http://ww2.justanswer.com/uploads/matteroner/2010-09-18_160857_ear-tape3.jpg