With my iRiver H320 it takes a very long time before a track starts playing.

[Ton]

Since I bought an iPhone I didn't use my (old but still fine) iRiver H320 anymore. I also had a Cowon D2+ but somehow I have bricked it and because of that I took up my iRiver H320 again to see if it still worked fine. With the iRiver firmware it did and because I still had the patched firmware on it I also installed the latest, 3.13, Rockbox on it again.
To my surprise it didn't work. In the past, with earlier Rockbox versions, I had no problems at all,  but now it takes ages before a track starts playing.
What could be the cause ? Am I doing something wrong or did I forget to make a particular setting ? (Btw, Directory Cache is ON). As I said, I have used Rockbox in the past and never had a problem. Also with the iRiver firmware everything is fine.
Thanks in advance.