Many packages require tcltk.

I have installed http://cran.r-project.org/bin/macosx/tools/tcltk-8.5.5-x11.pkg and yet, when I try
library(gamlss.demo)
I get
Loading required package: rpanel
Loading required package: tcltk
Error : .onLoad failed in loadNamespace() for 'tcltk', details:
  call: dyn.load(file, DLLpath = DLLpath, ...)
  error: unable to load shared object '/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so':
  dlopen(/Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so, 10): Library not loaded: /usr/local/lib/libtcl8.6.dylib
  Referenced from: /Library/Frameworks/R.framework/Versions/3.0/Resources/library/tcltk/libs/tcltk.so
  Reason: image not found
Error: package ‘tcltk’ could not be loaded


> sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-apple-darwin10.8.0 (64-bit)

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
[1] datasets  utils     stats     graphics  grDevices methods   base     

other attached packages:
[1] sos_1.3-7       brew_1.0-6      ggplot2_0.9.3.1 car_2.0-18      nnet_7.3-7      MASS_7.3-28    

loaded via a namespace (and not attached):
 [1] colorspace_1.2-2   dichromat_2.0-0    digest_0.6.3       grid_3.0.1         gtable_0.1.2       labeling_0.2      
 [7] munsell_0.4.2      plyr_1.8           proto_0.3-10       RColorBrewer_1.0-5 reshape2_1.2.2     scales_0.2.3      
[13] stringr_0.6.2     

______________________________________________
Professor Michael Kubovy
University of Virginia
Department of Psychology
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