[otrs] webmail module won't display new messages

This is a repost, as there has been no positive response. I have a new deployment of OTRS 2.2.3 I've also deployed the OTRS Webmail client (v. 0.11.2). The Webmail client is disfunctional. The INBOX and other mailboxes work correctly. I can send mail with no problem, also. But, when clicking on a message to display it, I get the OTRS screen, and a "View" menu (with back/reply/reply-all/plain/delete), and a small grey area marked "options", but the message never displays. If someone would like, I'll include a screenshot. There are no apparent errors showing in my Apache error log, nor in the system message log. Advice, anyone? -- Mark J. Nernberg