My added packages won't load in r.2.13.0

Problem:

I updated from r.2.12 to r.2.13 and when I use library(car) for example it says:

library(car)

Error in library(car) : there is no package called 'car'

So I found that the packages I had before are located in:
C:\Users\Documents\R\win-library\2.12

Now they're in:
C:\Users\Documents\R-2.13.0\src\library

I tried to use control+a and drag them over to the folder
C:\Users\Documents\R-2.13.0\src\library

and then  load car.

I still get the same error message.

How do I move my packages so the new version of R can find them?