Is it possible to work with options files on MKS.exe?

Dear all,

we like to reserve one or more licenses for a specific subnet or a couple of computers. 

We tried to add an option file to the mks daemon but it seems not to be parsed.

Our license looks like this now:

# Do not change the following three lines
#_PTC_CUSTOMER_NUMBER: xxx
#_PTC_INSTALL_SITE_NUMBER: xxx
#_PTC_CONTRACT_NUMBERS: xxx
SERVER xxx xxx
VENDOR MKS
DEAMON MKS "C:\Program Files\FlexNet Publisher License Server Manager" "C:\Program Files\FlexNet Publisher License Server Manager\licenses\MKS\user_options.txt"

and in the user_options.txt file we put:

RESERVE 1 MKSIntegrityManager-Float INTERNET 192.168.20.*
RESERVE 1 MKSIntegrityServer INTERNET 192.168.20.*
RESERVE 1 MKSIntegrityServer-DBBackend INTERNET 192.168.20.*
RESERVE 1 MKSSourceIntegrity-Float INTERNET 192.168.20.*

But it's not working. Does the MKS daemon support FlexLM option files in general?

Thanks in advance and kind Regards,

Ulf.