What is The Problem(s)? :(

[Cagonni]

Database error in vBulletin 3.6.0:
Invalid SQL:
  SELECT post.*
  FROM post AS post
  LEFT JOIN deletionlog AS deletionlog ON(deletionlog.primaryid = post.postid AND type = 'post')
  WHERE threadid = 8
   AND dateline > 1155014895
   AND visible = 1 AND deletionlog.primaryid IS NULL
   AND postid <> 10
  ORDER BY dateline DESC
  LIMIT 1;
MySQL Error  : Column: 'dateline' in where clause is ambiguous
Error Number : 1052
Date         : Wednesday, August 9th 2006 @ 12:28:15 AM
Script       : --
Referrer     : --
IP Address   : xxx.xxx.xxx.xxx
Username     : name
Classname    : vb_database

im boring of this db error
i searched the forum and all the sites about vbulletin.The problem is "Prevent Double Post" they said.I disabled the plugin but the error is continuing..I think My other plugins and products dont give that error.Do Prevent Double Post Plugins tables remained in my database?

Another Question

I cant make two post consecutively.Its not a time problem.After 2 or 3 days from my first posts if there is any post after mine i cant post any message

The Error above quick reply part is

The following errors occurred when this message was submitted

Okay

But there isnt any error it shows

when I click the "Okay" all it does is go back to the normal quick reply box.

Do You Have Any Ideas With These Problems?