Williams sisters Address

[ryanhenin]

Last month I sent a packet to the international Williams sisters.The address is:
Venus & Serena Williams
Venus & Serena Williams Tennis Academy
Attn: Richard Williams
P.O. Box 561122
Los Angeles, CA 90056
USA
But today I received a package returned.I can give them is to send a gift, I hope they will enjoy the special gifts.Will, who had to give them a letter or send a gift and received a reply, or until they receive a query.Please tell me the address, I want to send it again. THX