QuickSmelt not working. Config (attached) is correct.

Can someone let me know why QuickSmelt (reloaded several times) isn't working? Just wiped the server and it's gone back to vanilla speed.

Thanks!

{
"Use Permission": true,
"Speed Multipliers": {
"global": 10.0,
"furnace": 10.0
},
"Fuel Usage Speed Multipliers": {
"global": 1000.0,
"furnace.shortname": 1000.0
},
"Fuel Usage Multipliers": {
"global": 1000.0,
"furnace.shortname": 1000.0
},
"Output Multipliers": {
"global": {
"global": 1000.0
},
"furnace.shortname": {
"item.shortname": 1000.0
}
},
"Whitelist": {
"global": [
"item.shortname"
],
"furnace.shortname": [
"item.shortname"
]
},
"Blacklist": {
"global": [
"item.shortname"
],
"furnace.shortname": [
"item.shortname"
]
},
"Smelting Frequencies (Smelt items every N smelting ticks)": {
"global": 1000.0,
"furnace": 1000.0
},
"Debug": false
}

Fuel Usage Multipliers should be 1000, not 1000.0. Same for Smelting Frequencies.