Why can not upload files with no response

I have installed ckfinder2.1 with my struts2 applications.
Ckfinder manager interface was displayed normally.
But when I tried to upload files , No response and all folders were empty.
List my config.xml below:
<config>
<enabled>true</enabled>
<baseDir></baseDir>
<baseURL>/bjrsrc/upload/</baseURL>
<licenseKey></licenseKey>
<licenseName></licenseName>
<imgWidth>1600</imgWidth>
<imgHeight>1200</imgHeight>
<imgQuality>80</imgQuality>
<uriEncoding>UTF-8</uriEncoding>
<forceASCII>false</forceASCII>
<userRoleSessionVar>CKFinder_UserRole</userRoleSessionVar>
<checkDoubleExtension>true</checkDoubleExtension>
<checkSizeAfterScaling>true</checkSizeAfterScaling>
<secureImageUploads>true</secureImageUploads>
<htmlExtensions>html,htm,xml,js</htmlExtensions>
<hideFolders>
<folder>.svn</folder>
<folder>CVS</folder>
</hideFolders>
<hideFiles>
<file>.*</file>
</hideFiles>
<defaultResourceTypes></defaultResourceTypes>
<types>
<type name="Files">
<url>%BASE_URL%files/</url>
<directory>%BASE_DIR%files</directory>
<maxSize>0</maxSize>
<allowedExtensions>7z,aiff,asf,avi,bmp,csv,doc,docx,fla,flv,gif,gz,gzip,jpeg,jpg,mid,mov,mp3,mp4,mpc,mpeg,mpg,ods,odt,pdf,png,ppt,pptx,pxd,qt,ram,rar,rm,rmi,rmvb,rtf,sdc,sitd,swf,sxc,sxw,tar,tgz,tif,tiff,txt,vsd,wav,wma,wmv,xls,xlsx,zip
</allowedExtensions>
<deniedExtensions></deniedExtensions>
</type>
<type name="Images">
<url>%BASE_URL%images/</url>
<directory>%BASE_DIR%images</directory>
<maxSize>0</maxSize>
<allowedExtensions>bmp,gif,jpeg,jpg,png</allowedExtensions>
<deniedExtensions></deniedExtensions>
</type>
<type name="Flash">
<url>%BASE_URL%flash/</url>
<directory>%BASE_DIR%flash</directory>
<maxSize>0</maxSize>
<allowedExtensions>swf,flv</allowedExtensions>
<deniedExtensions></deniedExtensions>
</type>
</types>
<accessControls>
<accessControl>
<role>*</role>
<resourceType>*</resourceType>
<folder>/</folder>
<folderView>true</folderView>
<folderCreate>true</folderCreate>
<folderRename>true</folderRename>
<folderDelete>true</folderDelete>
<fileView>true</fileView>
<fileUpload>true</fileUpload>
<fileRename>true</fileRename>
<fileDelete>true</fileDelete>
</accessControl>
</accessControls>
<thumbs>
<enabled>true</enabled>
<url>%BASE_URL%_thumbs/</url>
<directory>%BASE_DIR%_thumbs</directory>
<directAccess>false</directAccess>
<maxHeight>100</maxHeight>
<maxWidth>100</maxWidth>
<quality>80</quality>
</thumbs>
<plugins>
<plugin>
<name>imageresize</name>
<class>com.ckfinder.connector.plugins.ImageResize</class>
<params>
<param name="smallThumb" value="90x90"></param>
<param name="mediumThumb" value="120x120"></param>
<param name="largeThumb" value="180x180"></param>
</params>
</plugin>
<plugin>
<name>fileeditor</name>
<class>com.ckfinder.connector.plugins.FileEditor</class>
<params></params>
</plugin>
</plugins>
<basePathBuilderImpl>com.ckfinder.connector.configuration.ConfigurationPathBuilder</basePathBuilderImpl>
</config>
Some details are:
1. When uploaded file is bigger, System tells:Servlet.service() for servlet ConnectorServlet threw exception java.lang.OutOfMemoryError: Java heap space
It is OK. I know reason.
2. When uploaded file is small under 100K,Not any response occur. No error but all folders are empty.
3. I have rewrite struts2 dispather, it didn't inspect ckfinder/core/connector
4. When flashupload plugin used, a ! occur in front of upload filename. After disabled flashupload plugin,No response again.
5.When ckfinder installed as war package, it works ok. This question occur only when ckfinder integrating into my ssh2 application.

Thank for your suggestion.