[R] problem in installing R packages on linux

[man4ish]

I am facing problem in installing the R package on linux .
When i put the command install.packages("BART")
Then it asks for selecting the mirror , i have selected the mirrror , but it
is showing no package in repository .I have selected different different
repository still i am getting the same error what can i do , please help me
out.i am sending the screenshot of unix terminal .
I will be thankful to you.Please help me out .  
http://www.nabble.com/file/p16760369/manish.png manish.png 
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