See if those folders are subscribed:

- on the main mail screen in the L. column, R. click the account (just above the Inbox) > Subscribe

Thanks for the prompt reply. I followed your advice but the only account in the drop down box is my Gmail account. I cannot bring up either of my other accounts in the subscribe windows. Mike

I successfully inclued my 3 email accounts but two of them only have inbox and trash folders none of other folders such as drafts, spam ,deleted or trash etc. folders.

By default newly created POP accounts only contain an Inbox and a Trash folder. The other special folders such as Sent, Drafts, Archives, .... will be created when you send or save or archive your first message in this account. A Spam folder will be created when you check "enable adaptive spam controls" in Account Settings > account name > Spam Settings ....