i own a new nikon D3100 and wanted to have a wireless remote. i bought the Pixel RW-221 wireless remote from eBay ( RW-221 Wireless Shutter Remote for Nikon D7000 D3100 | eBay ). however, when i hook it up, it don't work! the remote and the receiver are both on the same channel and they both light up green when i push 1/2 ways down on the shutter button on the remote, and when i press fully down, both flash red which indicated a photo should have been taken. but this doesn't happen, the camera doesn't even focus! is there some kind of setting that i should have my camera on? i even contacted nikon and they said the 3100 doesn't support wireless and that i should have a MC-DC2, but the link i provided above says it should! help please!