I entered my password, but my secure email just says "Loading PostX Tools" and never opens. What's wrong?
This is an indication that you do not have a current version of Java Runtime Environment installed on your computer. Go to http://www.java.com and download the current version of Java Runtime Environment.

When I try to attach a file to my secure email reply, I get the message "Could not upload due to an error."
It is recommended that attachments not be larger than 10 MB.  If you are sending more than one file, try separating them into multiple secure emails.  If you cannot reduce the size of your file, another method of delivery may be necessary.