Timeout caused by loops

...
outer:
while(BOUNDARY_END_FOUND == false){
if(SOCKET_DEAD == true){
Primary_Socket = new Socket();
if(Primary_Socket.listen(PORT) == true){
log("#Restarted. Server listening to Port: " + PORT);
}//if
Primary_Socket.encoding = "UTF-8";
//Primary_Socket.timeout = 15;
SOCKET_DEAD = false;
}//if
else if(SOCKET_DEAD == false){
Poll_Socket = Primary_Socket.poll();
inner:
while (Poll_Socket != null) { // <-------- AT THIS POINT THE SCRIPT FAILED IN THE SCREENSHOT
//Poll_Socket.timeout = 15;
log ("\nConnection from " + Primary_Socket.host);
log("Date: " + Date());
Poll_Socket.encoding = "UTF-8";
var counter = 1;
//strLine = Poll_Socket.readln();
var strLine = Poll_Socket.readln();
while(strLine.indexOf(BOUNDARY_END) == -1){ //while2
if(SOCKET_DEAD == true || Poll_Socket == null){
break inner;
}
...

The marked place in the code is the loop waiting for an incoming connection in order to poll the socket.

But as I mentioned before, the script fails always on different points of the code when run directly by FM.