@yecam: Moved your post to the right thread (you originally posted in the K2/3/4 thread)

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If you recovered everything properly (JB hotfix, KUAL update, reinstall everything), I can't think of any reason why that would fail on FW 5.6.x.
Make sure you're using the latest snapshots, on the off-chance I fixed something and forgot about it ^^.
Barring that, having a look at some system logs might shed a modicum of light on the subject (enter
;dm in the Homescreen's searchbar, and PM me the log files that'll dump in documents/).