Troubles installing ballgown

[batel]

Hi all,
I have lots of BAM files and I want to use ballgown for differential ewxpression.
I'm using the manuals (https://github.com/alyssafrazee/ballgown , http://master.bioconductor.org/packa...n/ballgown.pdf)
in order to install it and use it..
I have R version 3.1.2 and bioConductor version 3.0. The installation (from the README) seems fine, the last lines are:
** building package indices
** installing vignettes
** testing if installed package can be loaded
* DONE (ballgown)

The downloaded source packages are in
‘/tmp/RtmpNRWjaS/downloaded_packages’

BUT, when I try to use ballgown() (just to see if it works), I get an error:
Error: could not find function "ballgown"
I tried also stattest() and it gave me the same error..
I tried to use lines from the README and the manual but I got the same error.

I believe I'm doing something wrong.. can someone help me understand what's going on?
Thank you!!
Batel

[GenoMax]

Did you load ballgown package before trying other commands?

> library(ballgown)

Ballgown installed using following commands:

> source("http://bioconductor.org/biocLite.R")
> biocLite("ballgown")

[batel]

oh I'm ashamed. I had another troubles installing it earlier so "library" didn't help me than, and somehow I forgot use it after the installation worked..
Thank you very much!!!