请检查 您的数据库中 [dnt_polls] [dnt_polloptions] 这两个表中 有没有 voternames这个字段 如果没有说名没有成功升级数据库 ，
请按照 下面的sql语句指明的字段类型 建立缺少的字段
CREATE TABLE [dnt_polloptions] (
[polloptionid] [int] IDENTITY (1, 1) NOT NULL ,
[tid] [int] NOT NULL CONSTRAINT [DF_dnt_polloptions_tid] DEFAULT (0),
[pollid] [int] NOT NULL CONSTRAINT [DF_dnt_polloptions_pollid] DEFAULT (0),
[votes] [int] NOT NULL CONSTRAINT [DF_dnt_polloptions_votes] DEFAULT (0),
[displayorder] [int] NOT NULL CONSTRAINT [DF_dnt_polloptions_displayorder] DEFAULT (0),
[polloption] [varchar] (80) COLLATE Chinese_PRC_CI_AS NOT NULL CONSTRAINT [DF_dnt_polloptions_polloption] DEFAULT (''),
[voternames] [ntext] COLLATE Chinese_PRC_CI_AS NOT NULL CONSTRAINT [DF_dnt_polloptions_voternames] DEFAULT (''),
CONSTRAINT [PK_dnt_polloptions] PRIMARY KEY CLUSTERED
(
[polloptionid]
) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
CREATE TABLE [dnt_polls] (
[pollid] [int] IDENTITY (1, 1) NOT NULL ,
[tid] [int] NOT NULL CONSTRAINT [DF_dnt_polls_tid] DEFAULT (0),
[displayorder] [int] NOT NULL ,
[multiple] [tinyint] NOT NULL CONSTRAINT [DF_dnt_polls_multiple] DEFAULT (0),
[visible] [tinyint] NOT NULL CONSTRAINT [DF_dnt_polls_visible] DEFAULT (0),
[maxchoices] [smallint] NOT NULL CONSTRAINT [DF_dnt_polls_maxchoices] DEFAULT (0),
[expiration] [datetime] NOT NULL ,
[uid] [int] NOT NULL CONSTRAINT [DF_dnt_polls_uid] DEFAULT (0),
[voternames] [ntext] COLLATE Chinese_PRC_CI_AS NOT NULL CONSTRAINT [DF_dnt_polls_voternames] DEFAULT ('')
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
