Help with computer!

I’m sure many of you have changed computers and wanted all your data including music on the new machine. Me too.

I copied music onto a flash drive from the old laptop, and then moved those files to My Music on the Netbook. They show up, but Windows Media Player can’t seem to find them. I’ve googled until I’m blue in the face with no answers. I’ve wasted way too much time on what should be an easy task. Is there anybody out there can help?