Why can’t I edit my own posts?
The function has been disabled for members. Mods can edit, but they don’t let everyone do it so that there’s a record of what is said, not just what is edited. As it were.
This has been covered before,prolly before you registered, these two threads may be helpful in understanding why you can’t edit your own posts.
http://boards.straightdope.com/sdmb/showthread.php?threadid=99768
http://boards.straightdope.com/sdmb/showthread.php?threadid=100760