I'm mining akroma at minerpool.net but phoenixminer report connection closed by pool, my batch file:

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100

PhoenixMiner.exe -pool geo.pool.akroma.eu:8002 -wal $$$$.Rig001
pause

config file set default and nothing was change...

How can I change batch and config file for get better?? thanks