Anyone else having this problem? Thought iTunes was so great and so convenient, but I cannot listen to ANYTHING I've purchased from iTunes on my iPod. Tried deleting from the iPod and adding the music in question via EphPod, but same thing happens. . . I've added music via iTunes that I ripped from CD's (ripped with both iTunes and MMJB) and have no problems. . . It's only music purchased from iTunes. . .this totally stinks!!! Anyone have any suggestions?

Thanks in advance!