I followed the steps from here (http://forum.xda-developers.com/show....php?t=2128848) but did not want to install CWM. Wireless did work on my rooted Kindle before these steps were taken.
The steps that were taken causing it to no longer work are:
1. Install the stack override in /system:
adb push stack /sdcard/ adb shell su -c "dd if=/sdcard/stack of=/dev/block/platform/omap/omap_hsmmc.1/by-name/system bs=6519488 seek=1"
adb shell su -c "mount -o remount,rw ext4 /system" adb shell su -c "mv /system/etc/install-recovery.sh /system/etc/install-recovery.sh.bak" adb shell su -c "mount -o remount,ro ext4 /system"
fastboot -i 0x1949 flash bootloader kfhd7-u-boot-prod-7.2.3.bin fastboot -i 0x1949 flash boot kfhd7-freedom-boot-7.4.6.img fastboot -i 0x1949 flash recovery kfhd7-twrp-18.104.22.168-recovery.img fastboot -i 0x1949 reboot