The comment about the chips/morsels not melting because of the way they are made is fairly true. Chocolate chips seem to melt well, but because of the makeup of white chocolate, it stays more solid. Melting it with hot cream to make a ganache does work, but heating the chips by themselves usually won't.
What you should get are "melting wafers". They come in all flavours and colours and are specifically made for melting and dipping or molding. You can also use the block "baking chocolate" and it will work as well. The wafers can be found in bulk food sections, Michaels and anywhere you find Wilton products.
Hope that helps.
"Variety is not just the spice of life, it is the key to life" - Chef Michael Smith