BUG #1475: error to install language pltcl

The following bug has been logged online:

Bug reference: 1475
Logged by: Luciano Almeida
Email address: luciano.potencial@terra.com.br
PostgreSQL version: 8.0
Operating system: Windows XP
Description: error to install language pltcl
Details:

Hello....
I'm from brazil...

I'm trying to install the language pltcl but the pg show me
this message

createlang pltcl template1 -U administrador
password:
createlang: language installation failed: ERROR: could not
load library "C:\Arquivos de
Programas\PostgreSQL\8.0\lib\pltcl.dll": dynamic load error

The file are at especified direcotory

Do you have ActiveState TCL installed? Make sure it's directory with
TCL84.DLL is in the system path (not just your personal one), and also
make sure the postgres service account has read permissions on all the
files in the TCL directories.

If things look right, please run depends.exe (it's in the windows
support tools) on pltcl.dll to see exactly what breaks.

//Magnus