Error downloading betfair Mobile, incorrect MIDlet Data

I just bought a phone from a chinese website.  it is pretty good, everything works and i like the phone.  Only thing is, betfair mobile won't download but other java downloads have no problem.

this is a link to the phone, it has no "make"

http://www.lightinthebox.com/JC37-Dual-Card-Quad-Band-Dual-Camera-Flashlight-TV-JAVA-WIFI-3-2-Inch-Touch-Screen-Cell-Phone-Black-SZ04581507-_p124136.html

when i try to download it, i get the error

incorrect MIDlet Data

anyone got any ideas?

thanks