Problems installing Rcmdr

Hello! I am having troubles to execute Rcmdr. When I try to run it, this is what appears:

Error: package or namespace load failed for ‘Rcmdr’:
.onLoad failed in loadNamespace() for 'tcltk2', details:
call: file.exists("~/.Rtk2theme")
error: file name conversion problem -- name too long?

What can I do?

Have a look at this discussion on Stackoverflow. It may be of some help. Error ".onLoad failed in loadNamespace() for 'tcltk'"