Syncing Problem to iphone 5?

Okay, so on my computer, i have about 1000 songs. After i sync to my iPhone 5, it says i only have about 900. Why is this? Also, songs that i put on my computer from a cd won't play for some reason.

Thats not good

To solve this problem you can go to iphone customer care.

Check your available phone memory.
SETTINGS-GENERAL-USAGE

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