Philips HDD 1620 will not let me view pictures

Question

I have tried to synchronise pictures to my HDD 1620 many many times. WMP 10 allows me to do this and even states when i explore my device on the computer, that the pictures have been transfered. However, after i have synchronised the files and attempt to view them on my device it comes up with 'list empty' on the photo menu. Does anyone know how to solve this?