Is this what you bat file looks like?
./bfgminer -o stratum+tcp://stratum.btcguild.com:3333 -u username -p password -S all --icarus-options 115200:1:1 --icarus-timing 3.0=100
That looks pretty close to what I used on my old ASICMINER USBs. I know the arguments have changed with newer versions of bfgminer though (now you just use -S erupter:all and ignore the --icarus stuff).