JDM Programmer won't work with 8 pin chips

I bought a JDM programmer from ebay. It has slots for 8 pin, 18 pin and 28 pin chips. It's not a professional model, it's probably home made. When I use Winpic800 in Windows XP SP3 it is able to successfully read and write to both the 18 and 28 pin chips without a problem, but not with 8 pin chips. They're not automatically detected like the other chips nor can they be read of programmed properly. I think it might be due to power , but I'm on a desktop PC, so I don't think it's providing less power than required, plus why would 18 and 28 pin chips work all right. It could be the programmer, but all the connections appear sound, plus the thing came with some smart cards that already contained pre-programmed chips, including two 8 pin chips, so you'd think that it must've worked at some point. As it stands I haven't got a clue what I'm doing wrong and I would really appreciate help with this. Thanks :)

NachoMahma9 years ago
. I found this and this by Googling "JDM +8-pin" (I have no idea if either will help). Someone that knows what they're talking about will probably chime in soon.
. Also saw your post on dutchforce.