_id _servo --> -servo

conf.js

 
 var conf = {server : "i75419.berlin.ptb.de",
 	    port   : 8001,
-	    mpid   : "mpd-se3_servo"
+	    mpid   : "mpd-se3-servo"
 	   }
 conf.minvelo     = 5; // rpm
 conf.minclosepos = 10; // steps