The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on

[yehlu]

http://social.msdn.microsoft.com/Forums ... al-machine

[yehlu]

http://wangyuelucky.blog.51cto.com/1011508/1223311

原因：OleDb驱动的版本是32位的，而IIS服务器系统的位数为64位。
解决办法：在Application Pools 中配置Enable 32-bit Applications 为True