Versamail stopped checking IMAP email

Last week, my Treo 680's Versamail application began failing to connect with my IMAP server. I have checked my IMAP email with several other applications and verified the settings in Versamail. Versamail continues to sync with my work's Exchange server just fine, but I can't seem to get my personal IMAP account to connect. The Treo always times out and gives the following error:

"Unable to connect to mail.skott.us Please verify your server name entry."

I also tried to set up an account using IMAP SSL and the SSL settings from my email host but I got the same issue.