Load Error when 'texexec --mptex' is run.

[Jackie Wang]

Dear Sir,

I've followed what you wrote on the installations-how-to's, but once I start running line like:

mptopdf sample.mp

It gave me the following error:

     MPtoPDF 1.3.2 : running 'texexec --mptex '

     C:\texmf\scripts\context\ruby\texexec.rb:7: in 'require': no such file to load -- base/switch (LoadError)

     MPtoPDF 1.3.2 : error while processing mp file

But I checked the directory structure, in the same directory where texexec.rb exists, there's indeed a directory called 'base', and it does contain a file called 'switch'.

I'd appreciate any help.
Jackie