I am Vinod. I will try my best to help you resolve this issue.
What I understand is that you are not able to sync your music, but everything else syncs fine, correct?
I need a bit more information from you before I can guide you. Let's connect the ipad to the computer and open itunes. To the left side of the itunes, your ipad name will be listed under "devices". Just click on the ipad name and now to the middle of the screen, you will find a number of tabs such as Summary, Info, Apps, Photos, Music etc. Just click on Summary and scroll down. There is an option called "manually manage music". Is that checked or not checked?
Also, are you able to play the music from the computer?