Error with writing logfiles (change the permission)

Hello guys! Please tell me what is this error?
"Error: The folder F:\Users\Max\Desktop\cod4srv\mods\OPENWARFAREME\games_mp.log/ is not writable. Please change the permission of this folder"

Windows 7
Installed actually version of PHP (7.0.13 x86)
Replacing in gsm.cfg logpath with 2 backslashes not working.
Please help me.

Okay, I went back to the default settings
NAME="GSManager-1"
GAME="cod4"
CFGDIR="config"
LOGDIR="logfiles"
PHP="C:\php\php.exe"
(except for rcon-password, and port in [lexicon='basics.json',''][/lexicon]), the error changes to:
"Error: logfile is not readable: `\\`"