Unhappy [Q] bluetooth not pairing

hi fnds mine is micromax a110 it was rooted & i've flashed more than 7 roms & some worked nicely & some like miui v5 soft bricked my phone & from the helpers i'm out of those problems. now my phone is working very nicely & flawlessly with cruzer mod rom
but the only problem i've been facing is that my bluetooth is not working properly. it is recognising & get recognized by other phones but they are not pairing with my phone. so i'm unable to send & receive data via bluetooth. here is d exact error msg i'm getting always.

"Couldn't pair with xxxxxxxxxx (device name) because of an incorrect PIN or passkey."

but it is not showing me passkeys & not connecting with the targeted phone

But it is showing all d names of near by devices & my device is visible to all near by devices

this problem is there even in my last 4 custom roms. to overcoem from this problem only i've changed ultimate galaxy v2, miui v5, LegoIce™_Fusion_v2, custom roms but no use,
i thought it might because of that i've entered into engineering mode & i did some experiments there without any knowledge of it a minimum.
so pls help me friends in this issue
if any patch file like is there it will be very highly appreciated,
pls help me.