some help with Jailbreaking please

Hi people, 


Picked up an apple tv 2 yesterday and tried to jb it, ive been reading so much the last couple of days so feel ive done it correctly and followed all instructions, so anyway linked up the atv to my pc via usb and ran the seasonpass software, it extracted the software then came up with error entering DFU mode device not supported with seasonpass, so this happened like 4 times! so i tried it this morning and it seems to work, itunes opened and it restored and said custom isp or something created, then i linked it up to my tv and no signal? am i missing a step or not doing something right? i followed the instructions but after reading some posts, do i need to select tethered boot from teh seasonpass menu? thanks