Invalid SQL error after update 3.7.2 patch level 2

[Hal 2007]

This is a serious concern. I have version 3.6.8 and have been following the instructions as they come in to update. Everything has been running fairly smooth on my forum until today. I checked my admins email and discovered vBulletin errors coming in at a rate of about 1 per minute after around 11:00 am. I could still login so I went to the admin cp and checked for updates and found the latest version 3.7.2 patch level 2 and downloaded it to my hard drive and unzipped it and then ftped the files to the same folders on my server. I think it was admincp and includes or something like that. Also I turned off my forum before I ftped the files over. Now when I try to login I get the vBulletin database error screen with this additional yellow box of information at the bottom of the screen. Here is the information that I am getting. Can you please help me solve this issue? I am very very worried. I have done a backup about every month or so, but really don't want to have to go back to last months members entries. That would cause many of them to loose interest. The yellow information is included in the data quote attachment.

Please help.

Invalid SQL:

SELECT forum.forumid, lastpost, lastposter, lastthread, lastthreadid, lasticonid, threadcount, replycount, lastpostid, lastprefixid

FROM forum AS forum;

MySQL Error : Unknown column 'lastprefixid' in 'field list'
Error Number : 1054
Date : Tuesday, August 19th 2008 @ 01:13:41 AM
Script : http://(mywebsitename)/forum/
Referrer :
IP Address : **.**.***.***(removed)
Username : ***(removed)
Classname : vb_database