Sick Plant! 6 Days Life [PIC]

Hi,

I've have a problem with my Pineapple by GreenHouse, i grow in the same growbox:

- Super Silver Haze
- Shark Attack
- LSD
- Pineapple (sick )

All grows Under a 250w AGRO light, This is the growbox:



And this is the Sick Plant



BIG Link: http://img189.imageshack.us/img189/8408/dscf2298x.jpg

What can it be? Please i don't whant to lose it

Thanks to all

 

No one? ...Please