I can't send out campaign but can send out normal Email.

[yu xintian]

Hi,people here. I have : Sugar 5.2.0k on a Ubuntu Server Edition 9.10 . And I installed Sugarcrm followed this guide http://www.howtoforge.com/installing...on-ubuntu-8.10

Now I have created an email account on Sugarcrm connected with my Gmail account .And I can send out Email, but I can not send out campaign. I get error information from sugarcrm.log as :

Tue Jan 12 16:58:41 2010 [6547][1][FATAL] Email delivery FAILURE:Array
(
    [date_entered] => 2010-01-12 08:58:40
    [date_modified] =>
    [user_id] => 1
    [id] => 1018
    [campaign_id] => 2109ab98-1bbb-e7e0-4629-4b270c27415a
    [marketing_id] => d648abb3-f518-b131-45f5-4b270c58fa09
    [list_id] => 2e7694b3-ccc2-c043-7820-4b270cfa892d
    [send_date_time] => 2010-01-12 08:57:40
    [modified_user_id] =>
    [in_queue] => 0
    [in_queue_date] =>
    [send_attempts] => 0
    [deleted] => 0
    [related_id] => 52c1a24f-e636-b9f9-3d21-4b162720b201
    [related_type] => Leads
)

Does anybody know what is going wrong ? I have struggled with this problem for 2 days I will be grateful if you can give me any advice ! Thank you !

[yu xintian]

I even can't know the reason of this . I can only know it failed from the log .