cgminer.exe --scrypt -o stratum+tcp://litecoinpool.org:3333 -u Worker.1 -p x --gridseed-options=baud=115200,freq=888,chips=5 --hotplug 5

also the same occurs in case I mine with GPU, CPU and even with Gridseed

minerd.exe -o stratum+tcp://litecoinpool.org:3333 -u Worker.2 -p x

I opened this forum on the site of the pool
https://www.litecoinpool.org/account - so I supposed it was for this, sorry for posting in a wrong thread, I did not know where to ask this