Sorry for my poor english.
My configuration:

POP
Server: pop.gmail.com
Username: username (without @gmail.com)
Connection: TSL
Port: 995 (!override defolt value, TB will try to use it every time you will change connection method)
>Authentication:
Regular

SMTP
Server: smtp.gmail.com
Connection: STARTSL
Port: 587 (!override defolt value, TB will try to use it every time you will change connection method)
>Authentication:
Prform user auth...
Same user/pass...
(Uncheck everything else)