这错误怎么解决

[ziyucarol]

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

[sun_Ke]

不知道是什么错误~~

[HELLO_JIM]

????

[ziyucarol]

是在一个PANEL里面动态加了二个超链接，之前查07年1月数据没有问题的，但是查了04年后再查07年1月，就出这个错，就是到PANEL动态加这二个超链接的时候出这个错误，不知道是怎么回事，