Still can't do the pokemon trade using NO$GBA =.=?

I've read many Q&A regarding the linking 2 no$gba thingy(http://answers.yahoo.com/question/index?qid=20081126143816AAZnmTo) but still can't get it done.my problem is when i tried to open the 2nd machine,the 2nd pokemon game i tried to open will starts on the first machine and the second machine will remain blank.some videos in youtube shows how it is done but still,when i do exactly as told,the same problem occured.now im totally pissed since i cant evolve some of these pokemon require trade to evolve.FYI i play diamond,pearl and platinum..pls help me :((