Running EMS - Not Starting

I configured the config.json as follows

{

    "ws_servers":    [{

            "host":    "ec2-52-11-105-39.us-west-2.compute.amazonaws.com",

            "port":    80

        }],

    "appKey":    "3e871ea6-6f67-42ce-a6f0-4b2d041006f2",

"logger":    {

    "level":"DEBUG"

},

// Connection parameters 

"ws_connection":    {

    "encryption":    "none", // Defaults to ssl

    "verbose":    true

},

// Certificate settings

// NOTE: Only certificates signed with the MD5 or SHA1 hash functions will be accepted

"certificates": {

    "validate": false, // Boolean. Set to false to turn off certificate validation. Default = true.

    "verbose": true

}

}

Then running as follows (nothing happens). Second time when I run it doesn't even display "Starting up..."

D:\apps\MicroServer>D:\apps\MicroServer\wsems.exe -cfg D:\apps\MicroServer\etc\config.json

[INFO ] 2015-07-09 22:57:20,792 D:\apps\MicroServer\wsems.exe: Using config file: D:\apps\MicroServer\etc\config.json

[FORCE] 2015-07-09 22:57:20,792 D:\apps\MicroServer\wsems.exe: Starting up ....

D:\apps\MicroServer>

D:\apps\MicroServer>D:\apps\MicroServer\wsems.exe -cfg D:\apps\MicroServer\etc\config.json

[INFO ] 2015-07-09 23:00:04,984 D:\apps\MicroServer\wsems.exe: Using config file: D:\apps\MicroServer\etc\config.json

Not sure what is wrong? I tried with -loglevel TRACE but no additional output. Any help in debugging this will help.

Thanks and Regards