The file start-BTC launch and close very fast, this is the command line I use : " cgminer.exe -o stratum+tcp://eu-stratum.btcguild.com:3333 -u yassassin_1 -p 123 --gridseed-options=baud=115200,freq=750,chips=5,modules=1,usefifo=0,btc=64 --hotplug=2 "
I don't know which file "readme" you talk about.
Thanks
Read the README.txt and ASIC-README.txt in the cgminer directory, they list all the command line options for cgminer. --gridseed-options is not a valid option.