why my 405nm dose this

i had this blue violet diode from a philips blue ray dvd player forgot the model but got this part number ..
and of course im a newby .


and when i connect it to the driver it wont lasse .. pin out top +
mid not use which is
attached to base of
the diode.
bottom -
but when i connect the negative to the not used part ( which is the pin out connected to d base of the diode it lit up ...... pls help why is it........ tnx in advance

here the link to the part number .... http://www.mediafire.com/view/dddbdnr41b5fq0d/13413012_1202125883153400_184519132294685242_n.jpg