restored iPod! now I cant sync it and I cant see it in itunes!

ive restored my ipod and then i couldnt sync it , tryed on my moms mac which it worked and i could hear music on it so sync it and etc!!! i restored it on my moms mac but it doesnt want to sync back! whenever i go to music on my moms mac it says like finish configuring in finder but on finder it only says restore the ipod and the version of it . and i cant even see the ipod in music on my own mac! help me pleasseeee i would love some recommandations. also i use an usb convertor so ye