Tomcat SSL can login but can't download link files (pdf,zip,exe..)

Question

I'm able to install Entrust SSL in Tomcat running Windows 2008 server via port 8443.

Users can login securely with problems except that they can't download any *.zip or *.exe or *.pdf files. it will just refresh the same page.

Even right-click save on the link will prompt to save the page only.

using the same app on port 8080 (with ssl), the downloads works fine.

Is there any specific settings on the server.xml or web.xml that can solve this?

Below is my entry in server.xml

<Connector protocol="org.apache.coyote.http11.Http11Protocol"
           port="8443" 
           maxHttpHeaderSize="8192" 
           maxThreads="150" 
           minSpareThreads="25"
           maxSpareThreads="75" 
           enableLookups="false" 
           disableUploadTimeout="true" 
           acceptCount="100" 
           scheme="https" 
           secure="true" 
           SSLEnabled="true" 
           clientAuth="false" 
           sslProtocol="TLS" 
           keyAlias="tomcat"
           keystoreFile="C:\Program Files (x86)\Java\jdk1.6.0_13\bin\tomcat"
           keypass="aaaaaa"> 

Thanks.