sgminer 4.1.0 config file???

[onis_uk]

ive mined many times using cgminer for btc etc and i cant
seem to get my config file working to mine drk after much searching !!!
any help would be great !!!

[onis_uk]

i get this....

[12:25:45] Started sgminer 4.1.0
[12:25:45] Loaded configuration file sgminer.conf
[12:25:45] Fatal JSON error in configuration file.
[12:25:45] Configuration file could not be used.
[12:25:46] WARNING: GPU_MAX_ALLOC_PERCENT is not specified!
[12:25:46] WARNING: GPU_USE_SYNC_OBJECTS is not specified!
[12:25:46] Need to specify at least one pool server.
Input server details.
URL:


using config

GPU_MAX_ALLOC_PERCENT=100 ./sgminer -k darkcoin -o <stratum+tcp://europe1.darkcoin.miningpoolhub.com>:<20465> -u <***> -p <****> -I 18 -g 4 -w 128

Obviously with my password and username filled in