When i bought my phone i have 4 GB sd card of Samsung which i was using in my 730 and works smoothly.. Recently i bought a 16 GB sd card of Sandisk. Though it supports but i can not find my photos in photos app, and my when u try to play music from sd card by using xbox music app it started to play in background, the app doesn't show the songs playing page and also it cannot detect some songs from sd card. But with other app it works smoothly. My question is

1. Why does not it shows my photos in photo app (default app)???

2.Why does not the xbox music app shows the song it is playing and cant find some songs?

3. How to refresh both of this app??

Plz... help me out..... :( :( :(