R help - May 2011 - Problems with tcltk

Dear R-helpers,

I am using R x64 and when I want to load the tcltk library, it gives
me the following error:

Loading Tcl/Tk interface ...Error : .onLoad failed in loadNamespace()
for 'tcltk', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object 'C:/Program
Files/R/R-2.13.0/library/tcltk/libs/x64/tcltk.dll':
  LoadLibrary failure:  This application has failed to start because
the application configuration is incorrect. Reinstalling the
application may fix this problem.



I tried to reinstall tcltk
(ActiveTcl8.5.9.2.294317-win32-x86_64-threaded.exe) but it does not
solve my problem.

Here is my sessionInfo()

R version 2.13.0 (2011-04-13)
Platform: x86_64-pc-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_Canada.1252  LC_CTYPE=English_Canada.1252
[3] LC_MONETARY=English_Canada.1252 LC_NUMERIC=C
[5] LC_TIME=English_Canada.1252

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

Arnaud