first of all, welcome aboard.
not a bad start, not at all! was this scratch drawn, or did you base it on another shipbucket drawing?
while it seems not to match up everywhere with the real ship, it is hard for me to see where exactly.... may I see your source lineart?
also, there seem to be some parts which need updating to the latest standard, most notably the Mk 45 gun, Harpoon launchers, LW-08, directors and lynx helicopter. most if not all of these parts can be found here:
http://www.shipbucket.com/images.php?dir=Parts%20Sheets, except for the lynx helicopter, (of which the thai version might not have been drawn of the latest version....)
there also seem to be a few missing pixels at the bow and anchor, and you lack shading at some places (most notably, the bridge wing roof)