You are confusing official with bitmain versions of cgminer. The commands you are using with "au3" in them are for the official cgminer while "bmsc" options are for bitmain's unofficial version, yet you are using what appears to be an old bitmain version. Download the latest official cgminer 4.9.2 and use only the au3 options.
Official one is available here: http://ck.kolivas.org/apps/cgminer/
As for the "difficulty changed to 1024" that is 100% normal operation and you should stop seeing it as an error. Pools choose what diff you mine at and cgminer will tell you what it is.
Official one is available here: http://ck.kolivas.org/apps/cgminer/
As for the "difficulty changed to 1024" that is 100% normal operation and you should stop seeing it as an error. Pools choose what diff you mine at and cgminer will tell you what it is.
ok tnx., im using cgminer 4.9.2 now and running this line " cgminer.exe -o POOL URL:PORT -u USERNAME -p PASSWORD --au3-freq 250 --au3-volt 800 "
but its low hashrate its that normal? if not, so what should i do? is it my line of au3 is correct on cgminer 4.9.2?