gsub not works for me when replace 'DBCS'(double byte character set)
character,  using last version ruby 1.8.6

when "str¡ßend".gsub(/¡ß/,"hanzi"),
   output still is: str¥Ä¥³¥Ä¥³¥ÆÎÅËÆnd , but not strhanziend which I want to
get.

Searched web two whole night with no clue found.

Anyone can help are much appreciated, need got it work very urgent.
thank you!
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