Looks like you are trying to use an older 3+ year old PC version of AirPort Utility.....which is not officially supported......with the new Time Capsule.
You might want to review the System Requirements for the Time Capsule from Apple's specifications:
System Requirements
Setup and Administration
iPhone, iPad, or iPod touch with iOS 6 or later and AirPort Utility 1.3
or
Mac with OS X Lion v10.7.5 or later and AirPort Utility 6.3 or higher