When using the Yamaha Pronto IR Hex Converter, it is necessary to put a space between the first 2 bytes and the second 2 bytes.  Use 40BF 30CF instead of 40BF30CF.  The Pronto Hex you generated using 40BF30CF decodes as 0x000080DD, and of course it doesn't work.

It is far better to use instead IrMaster, because it gives you the facility to enter the above bytes and to then decode the generated Pronto Hex to see if it is reasonable.  Select NEC1, enter 0x40 into the D field and 0x30 into the F field. leaving S blank.  
0000 006C 0022 0002 015B 00AD 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0041 0016 0016 0016 0016 0016 0016 0016 0016 0016 0041 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 0041 0016 0041 0016 0016 0016 0016 0016 0041 0016 0041 0016 05F7 015B 0057 0016 0E6C

We don't need to enter the BF or CF into IrMaster.  Note that in your decode 40 and BF add to FF, and 30 and CF add to FF.  That's a characteristic of the simplest form of NEC, so IrMaster can calculate the BF and CF values. We ususally describe this as NEC1 device 64, function 48.  If the first two bytes don't add to 0xFF, then enter the first byte into D and the second byte into S.  Finally if the 3rd and 4th bytes don't add to 0xFF, use NEC1-f16 as Barf described above.  Of course you can always use NEC1-f16 if you don't mind typing in all 4 bytes.