Realtek RTL8723AE-BT stops working when Kernel 3.5.0-21 is used

Realtek RTL8723AE-BT stops  working when Kernel 3.5.0-21 is used ,how to make the Realtek RTL8723AE-BT work?

The model is: Realtek RTL8723AE Wireless LAN 802.11n PCI-E NIC

Install the new kernel ,them recompile ,run the update manager so that all the repositories and dependencies are updated .
Then do this 

cd Desktop/RT8723  <--or wherever you compiled the package
sudo su
make clean
make
make install
modprobe rtl8723e
exit

then do this 

./scripts/driver select rtlwifi
make
sudo make install
sudo modprobe rtl8723ae

You 'make clean' because the module was compiled originally against your specific versions of kernel, headers, gcc, etc. When updates are installed, the various files built in the compile process may or may not work correctly with, for instance, a newer gcc version, so wipe it all out and start fresh: make clean