已经安装了pymssql模块，运行还是出问题

我已经安装了pymssql-1.0.2.win32-py2.6.exe
但是运行脚本还是会出现
Traceback (most recent call last):
  File "C:\Documents and Settings\Administrator\桌面\新建文件夹 (3)\只读.py", line 4, in <module>
    import pymssql
  File "C:\Python26\lib\site-packages\pymssql.py", line 30, in <module>
    import _mssql, types, string, time, datetime, warnings
ImportError: DLL load failed: 找不到指定的模块。

脚本在其他的机器上运行没问题，就我机器有问题，请经验丰富的高手帮忙下～谢谢了～

请高手指点下～谢谢了～

#-*-coding:cp936-*-
#已经可用
from CreateExcel import CreateExcel
import pymssql
conn = pymssql.connect(host='#这是机器IP地址', user='#这是SQL帐号', password='#这是SQL密码', database='newsforPDA')
cur = conn.cursor()

cur.execute(u"SELECT cast(title as text),cast(content as text) FROM newsbycharles WHERE system_date='%s'"%"2011-05-03".decode('gbk'))
mainlist=[]
for row in cur:
    mainlist+=[row]
    print row[0]