DZ程序安装插件出错 localhost, error, 空间

Discuz! info: MySQL Query Error

User: 口袋的梦想
Time: 2011-2-26 4:04pm
Script: /plugin.php

SQL: SELECT * FROM `pokelm_ucenter`.uc_members WHERE uid='1'
Error: SELECT command denied to user 'pokelm_discuz'@'localhost' for table 'uc_members'
Errno.: 1142

Similar error report has been dispatched to administrator before.

这个怎么办
在别的空间上没出错啊
而且这个空间安装每日签到也没出错的

再在那里注册个空间照样安装不上··