Hi all, new here. I have a NW-E507, which I upgraded to firmware ver 2.00. I use MP3 File Manager to transfer songs to my player, because I hate using SonicStage and I have already my library in MP3 format. After the first transfer all was OK, but when I wanted to delete some files and to replace them with others, "Cannot play" appears on each new transferred song. The files are OK, I use only one level of dirs, and to test I uploaded some files which were already on the player, and surprise! the new ones don't play. Using user manual's advice, I formatted the memory (took less than a second!) and transferred, in 2 steps, the songs. All played well. Then I noticed that the songs in a dir had their ID3 info incorrect, dashes and even strange chars instead of track/artist (they were plain ASCII on my PC) though they played OK. In an attempt to solve the problem, I deleted them and transferred them back to the player. This time the names are correct, but each new song says "Cannot play". So basically whenever I want to delete something, new stuff will not be playable and I have to format the memory??? Please help!