stereo BT BTi 660 stopped working after 1st time

[Guest Quang05BlkBoxsterS n Omnia]

I am still using Qbus's DXID1 Q7 ver (wm6.1) with the BTi 660 stereo BT headphones. First time pairing worked fine with a couple of media players (wm fully worked with the BT remote buttons). Then after power off/on (both devices) the phone only worked with the BT hp in phone calling mode and there was no more BT icon at the top display indicator (only BT icon in the phone dial mode). Even a check in stereo music box under BT setting did not help.

Trying to pair again would not work anymore (usually it would ask for the pairing code), and the saved file under FTP folder (with a memory icon like the internal my storage folder) could not be deleted (a system file). A soft reset did not help or anything in that sense at all. So I restored to an earlier settings (basically to delete the BT system file but everything else) and pairing code came up and it worked again, but it stopped if turning both devices off/on (no music streaming but only phone call).

Also the BT worked just fine with a friend's brick LG slider so the problem is with the ROM.

Does anyone had the same issue? and a working solution for this cooked ROM is greatly appreciated. The reason I probably want to keep this BT headphone receiver is it allows other 3.5mm headphones. SE DS980 might not work with this cooked ROM and it only comes with its own set.

Thanks! :D