Happy Tree Friends

I did already download all the eps but, for some reason, they all dissapeared. I managed to download 3 of the eps and watched them all but i cant download the other episodes!!! Everytime i click, get the episode, it downloads it but I look in my podcasts qnd they arent there, only the 3 episodes I already had :$ its getting me really mad as I have tried 17 times, please help me!!