Corion hasn't used his telepathic powers on this one yet, so I'll try to use my weaker ones.

1. Delete the use line that wants to include the module. Then add that use line again rewriting it from scratch. Try to see if this changes anything.
2. Instead of scraping gmail with mechanize, get some modules that use the underlying protocols (POP3/IMAP to download email from your mailbox, SMTP to send mail, XMPP to chat).
3. Update: if all else fails, try copying the exact source and the exact error message here. If possible, use a computer to copy them, don't copy by hand.

(Note: there was some discussion in the chatterbox that precedes this.)