Get Mail and Get All New Messages button not working in Thunderbird 13

When pressed nothing happens, and it does not check mails for multiple accounts.

NOTE: Problem occurred on Thunderbird 13 installed on Fedora Core 15

1. Open Thunderbird
2. Click on Edit->Account Settings
3. Under each Mail Account click on Server Settings and then on the Advancedbutton
4. Tick the checkbox next to Include this server when getting new mail
5. Click OK

Repeat the above steps for each mail account where mails need to be fetched when the Get Mail or Get All New Messages option is clicked