江湖紧急求救..warning: Cannot modify header information - headers already sent by (output started at d:\program files\easyphp1-8\www\d

今天一直是好好的网页,不知道我操作什么了(忘记了,保证是小动作,),现在网页老是一登陆就报warning: Cannot modify header information - headers already sent by (output started at d:\program files\easyphp1-8\www\drupal\includes\common.inc:1) in d:\program files\easyphp1-8\www\drupal\includes\common.inc on line 141.
错误,请各位帮忙看看了,多谢多谢,着急呢...