I am experimenting this problem deleting an IP restriction on IIS:
I have given all permissions to the user but it did not resolve the problem, I also try to free some space on disk without any result, is there anything that I can try to solve it, this is happening since a month ago, thanks beforehand for any help.
It seems that the log server finish in an invalid state because of the memory was full time ago, so once the memory was empty I rebooted the server and everything works perfectly.