Docx4j with weblogic Bad [Content_Types] .xml Exception

Question

how to solve this exception when I use docx4j with weblogic to open a docx file. follow is my code:

WordprocessingMLPackage templatePackage = WordprocessingMLPackage .load(getDocxInputTream()); 

An exception:

 2013-04-03 18:10:29 ERROR ContentTypeManager:698 - java.lang.NullPointerException org.docx4j.openpackaging.exceptions.InvalidFormatException: Bad [Content_Types].xml at org.docx4j.openpackaging.contenttype.ContentTypeManager.parseContentTypesFile(ContentTypeManager.java:699) at org.docx4j.openpackaging.io.LoadFromZipNG.process(LoadFromZipNG.java:206) at org.docx4j.openpackaging.io.LoadFromZipNG.get(LoadFromZipNG.java:193) at org.docx4j.openpackaging.packages.OpcPackage.load(OpcPackage.java:301) at org.docx4j.openpackaging.packages.OpcPackage.load(OpcPackage.java:245) at org.docx4j.openpackaging.packages.OpcPackage.load(OpcPackage.java:213) at org.docx4j.openpackaging.packages.WordprocessingMLPackage.load(Wordpr ocessingMLPackage.java:184) 

Thanks in advance!