COnversion We are converting an Imperial IDR-6 from LP to Natural. The problem...the oven won't light...the pilot comes on but won't light. What else does my husband need to do

Make sure the regulator is converted properly and the gas safety valve has a place where you can get a wrench on it where the orifice comes out the top of the valve (look where the burner sits on top of the valve) you adjust it there. if the unit doesn't light at all you may have other issues. if you bought it used and were told eveything works but now it doesn't that may not have been true. the conversion is pretty easy so don't blame yourself if you don't know for sure this unit was operational before the switch to natural I would hate to send you chasing phantoms