trim() removes german special chars

i have noticed that the trim()-function mostly trims the german special chars:

test$="&auml test &auml":Print Trim(test) ; result: "test"
test$="&ouml test &ouml":Print Trim(test) ; result: "test"
test$="&uuml test &uuml":Print Trim(test) ; result: "&uuml test &uuml"
test$="&Auml test &Auml":Print Trim(test) ; result: "test"
test$="&Ouml test &Ouml":Print Trim(test) ; result: "test"
test$="&Uml test &Uml":Print Trim(test) ; result: "test"
test$="&szlig test &szlig":Print Trim(test) ; result: "test"

WaitKey
End

sorry.

something went wrong with my first post. hopefully this one works:

test$="ä test ä":Print Trim(test) ; result: "test"
test$="ö test ö":Print Trim(test) ; result: "test"
test$="ü test ü":Print Trim(test) ; result: "ü test ü"
test$="Ä test Ä":Print Trim(test) ; result: "test"
test$="Ö test Ä":Print Trim(test) ; result: "test"
test$="Ü test Ü":Print Trim(test) ; result: "test"
test$="ß test ß":Print Trim(test) ; result: "test"

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Try this:
http://www.blitzmax.com/codearcs/codearcs.php?code=137