Hello. Go alone HW ..... what is wrong with the settings???

Please tell me. Here are the settings MSI R9 280X Gaming 3Gb :
setx GPUMAXALLOCPERCENT 100
setx GPUUSESYNC_OBJECTS 1
microCoinminer.exe -o stratum+tcp://mrce[Suspicious link removed]t2pools.com:6000 -u xxxxxx -p x -o stratum+tcp://mrc.blocksolved.com:3310 -u xxxxxx -p x --scrypt --Nfmin 4 --Nfmax 30 --StartT 1389028879 -g 2 -I 11 --thread-concurrency 16384 --no-submit-stale --lookup-gap 2 --expiry 10 --scan-time 1 --queue 0 --gpu-engine 1100,1100 --gpu-memclock 1450,1450 -w 31 -E 10 --gpu-fan 60,60
Until 23/03/14 this all was well.
why is -w 31? try 256 or 384. I also don't recognize -E 10, I don't have any -E value... sorry id post my bat but I use 270/270x atm