Help me break through a wall please!

Hi guys. First post ever. I wonder if you would take a look at my form and give me some constructive criticism. I'm swimming on the Hokkaido masters circuit just for fun, doing 25m and 50m free. Sometimes Fly. I'd like to get deep into the 23's, but I'm currently doing 24.2's. P.B this year is a 23.96... Kunneppu 2012 25 Free - YouTube Furano Cup 2012 : 富良野カップ２０１２年 - YouTube 深川水æ¸ãƒ—ール記録会２０１２年：Fukagawa Pool Annual Swim Meet. - YouTube What must I do! Best regards, Andy.