飞天侠程序

求助为什么我的飞天侠后台显示：Incompatible file format: The encoded file has format major ID 3, whereas the Loader expects 4 /home/wzm518/domains/wzm518.cn/public_html/app/Lib/Action/admin/settingAction.class.php 第 0 行.
错误位置
FILE: /home/wzm518/domains/wzm518.cn/public_html/thinkphp/Lib/Core/Think.class.php 　LINE: 242
TRACE
[13-12-21 12:13:12] /home/wzm518/domains/wzm518.cn/public_html/thinkphp/Lib/Core/Think.class.php (242) halt(Incompatible file format: The encoded file has format major ID 3, whereas the Loader expects 4 /home/wzm518/domains/wzm518.cn/public_html/app/Lib/Action/admin/settingAction.class.php 第 0 行.)
[13-12-21 12:13:12] /home/wzm518/domains/wzm518.cn/public_html/thinkphp/Lib/Core/Think.class.php (257) Think::appError(1, Incompatible file format: The encoded file has format major ID 3, whereas the Loader expects 4, /home/wzm518/domains/wzm518.cn/public_html/app/Lib/Action/admin/settingAction.class.php, 0)
[13-12-21 12:13:12] () Think::fatalError()