Risk of Being Rejected?

Hey there,
I have a question about H1B visa.
I\'m going back to China in April and come back to States at the end of April. I need to have my H1B approved. The situation is my current H1B is expiring February 09. My employer filed PERM in November 2007, but we have not heard anything yet other than an unfortunately RFE...
Anyway, is there any risk for my application of H1B to be rejected?
Apprecaited your help!