I can't mine at pool... please, anyone could post your batch file...
My .bat file is:
minerd -o stratum+tcp://pool.merit.me -u xxxxxxxx -p x -t 3
minerd.exe -o stratum+tcp://parachute.merit.me:3333 -u xxxxx -t 2 -C 2
That's for Windows and works

Probably missing the port 3333