[BioC] DESeq installation problems

[Devi Swain]

Hi all,

I am trying to install DESeq on R 2.15.1 (on a MacOSX 10.6.8).  
I tried changing my CRAN and BioC mirrors as suggested on a previous post. 
I either get “DESeq is not available for R 2.15.1” or the warnings 

Using R version 2.15, BiocInstaller version 1.4.7.
Warning: unable to access index for repository
http://brainarray.mbni.med.umich.edu/bioc/bin/macosx/leopard/contrib/2.15
Installing package(s) 'DESeq'

I have DESeq 1.83 in the repository, but would like to install the newest version

I appreciate any help.

Thanks!
Devi