your wife has been working for 6yrs, why didnt she apply for ILR after working 5yrs ???
she should not need to take the test to apply for ILR, which form did you use ilr(o) or ilr(m) ???
looks like you applied for ilr(m) ? if you did looks like to me you applield for the wrong visa, it should have been ilr(o) using her workpermit to get ilr, or flr(m) as a spouse and it looks like ukba think your wife should be appyling for flr(m) and if so she needs to pass the english language test..
need to know which form you used and if your wife has a workpermit
