Good evening Samsung,
Believe me, we Pros here on Trulia want to help you but your question is a bit vague. Sounds to me like you've closed on the purchase of a home---Congratulations!---and you've just received your first payment statement. What differs on the statement from the HUD-1? Is the name of the Lender different? This is common practice that your loan may already have been sold to a different Lender. This is known as a transfer of servicing; it does not affect your interest rate or monthly payment, only the name of the Lender you write the check to.
I recommend what I tell all my clients here in New York: call your Loan Officer who helped you with the financing for your home purchase.
If I'm wrong in my assumption, please post more info so we can guide you accordingly.