So there is a setting on the RC server side where you can include an acceptTimeout=15000 under the sockserv section of RC ot.ini file, do not be confused with timeout=5000 default value.Include one extra line and test, i am also running into similar issue but this parameter has not resolved our issue.
If i get it working by other LL config, ntk tuning etc will keep here posted.
Cheers,
Mukesh Giri