[LEAD_WEIGHT]

njoker555 you must of miss the last part of the instruction on fisrt post.

Admin CP > Styles & Templates > Style Manager > StyleVars {Drop Down Menu} > Sizes and Dimensions

• Message Area Width (pixels): [440px]
  (This value allows you to specify the width in pixels of the text box used for all message posting in vBulletin)
  
• Code Block Width (pixels): [440px]
  (This value controls the width of [code], [php] and [html] bbcode blocks. You may set this value to 'auto', but if you do, Internet Explorer will stretch the width of the block rather than inserting a scrollbar.)

Maintenance > Update Counters > Rebuild Post Cache

You also need to use postbit instead of postbit_legacy to utilize the most of message space.