I had problems with this and I had to make a 12.5 drawing and place all the plant symbols in this. and open in 2009 and save as 12.5 plants symbolsand add the drawing in favorites in the resource browser. I have been able to use them here althoughn I have not done much in changing colore etc. You do have to make any changes in tags, etc before using them it seems like.
fwiw
as a novice You get what you paid.
jim