Help here a bit lj geeks :D

Sup guys
Seems like im not improving my lj skills
Im jumping 252 easily but somehow im just not getting better last days
I can jump 253 but it's soooo rare
My lj record is 254 stats and 252 block

Here is a demo of me practicing on 245 block, please download it and tell me what im doing bad, ill appriaciate it a lot!

http://www.megaupload.com/?d=43AESUU5