So both my warlock (Iseraduna) and mage (Melka) have the Burst of Knowledge trinket equipped in their second trinket slots (slot 14).

The mage's macro is

/assist iseraduna
/use 14
/cast frostbolt

The 'lock's is

#showtooltip
/cast [nomod, nochanneling] health funnel
/use [mod:shift] 14
/cast [mod:shift] shadow bolt
/script UIErrorsFrame:Clear()

The mage's macro works, but I the warlock's doesn't seem to. I even tried simplifying the 'lock's macro to

/use 14
/cast shadow bolt

but it keeps saying "Item is not ready yet". Anyone know what's up?