the TP-Link WN722NC v1.1 usb adapter should use an Atheros ar9271 chipset. This chipset is supported in the latest ath9k_htc kernel module (http://linuxwireless.org/en/users/Dr...sets_supported).
Did you try with BT5 or BT5R1 they use different kernel and perhaps the BT5 doesn't handle the ath9k_htc module.
BT5 has kernel 2.6.38 versus BT5R1 that has kernel 22.214.171.124.
To see what kernel you are running type
If you are on BT5 either do a clean install from a BT5R1 dvd or try doing
which should upgrade the distro over the internet.