supesite崩溃，Discuz无法发帖，十万火急！请高手帮忙！！！！

我的Discuz从4.1升级5.0显示全部成功，但是升级后页面显示版本仍旧是4.1，并且不能发表新帖了，经过反复实验后，失去耐心，便将整个站点supesite+Discuz从服务器上全部删除，又把原来的备份整体上传，但是却出现supesite完全无法打开，原来正常的Discuz仍旧无法发表帖子，我都快崩溃了，请各位大侠帮助指点。

具体症状是：supesite
Fatal error: This encoded file is corrupted. Please refer tohttp://www.zend.com/support/support_faq.php?id=loader_file_corrupt for further help in /www/users/zhuor.com/blog/index.php on line 0

Discuz论坛发表新帖点提交后出现这个页面：

Discuz! info: MySQL Query Error

User: 卓群
Time: 2006-10-27 9:03am
Script: /bbs/post.php

SQL: INSERT INTO cdb_threads (fid, readperm, price, iconid, typeid, author, authorid, subject, dateline, lastpost, lastposter, displayorder, digest, blog, poll, attachment, subscribed, moderated)
VALUES ('47', '0', '0', '0', '0', '卓群', '2', '退热突然', '1161911007', '1161911007', '卓群', '0', '0', '0', '0', '0', '0', '0')
Error: Unknown column 'poll' in 'field list'
程序文件跟数据库有冲突，请使用正确的程序文件上传上去覆盖

Similar error report has beed dispatched to administrator before.