用Word2003类加载wps文件的时候报错了

[xdedeqq]

java.lang.IllegalArgumentException: The document is really a XML file
at org.apache.poi.hwpf.HWPFDocumentCore.verifyAndBuildPOIFS(HWPFDocumentCore.java:123)
at org.apache.poi.hwpf.HWPFDocument.(HWPFDocument.java:169)
at com.insigma.Word2003.(Word2003.java:67)
at com.insigma.Word2003.(Word2003.java:51)
at com.insigma.Word2003.(Word2003.java:40)
at com.insigma.DocumentPreviewer.main(DocumentPreviewer.java:21)