[winGRASS] run grass on cygwin

[Sergio Vicente]

Dear win-grass users.

I am starting in this software and I am trying to run it in windows. I have 
installed the software without problems according to instructions indicated 
in 
http://grass.baylor.edu//grass5/binary/windows_cygnus/cygwin_grass50bininstall.html.

I have started grass on cygwin and the program starts without problems 
using the XFree86 desktop mode. Nevertheles, when I want to start the 
graphical user interface writing tcltkgrass, a error command line appear 
indicating exec: wish: not found.

Does anyone know what can be the problem?.

Many thanks

Sergio Vicente