CKEDITOR is not defined

not change any code, test CKEditor 3.1 _samples/skins.html below,
native path: file:///D:/www/ckeditor/_samples/skins.html OK
server path:http://localhost/ckeditor/_samples/skins.html Failure

js error:
missing formal parameter
[Break on this error] otype.getElementsByTag,getTabIndex:c?fun...)!==0)i=-1;return i;}:b.webkit?function(ckeditor.js (136)
CKEDITOR is not defined
[Break on this error] CKEDITOR.replace( 'editor_kama',\r\n

please help