Java binding exception

I am getting the following exception thrown when I attempt to upload an object to a namespace:

Exception in thread "main" com.emc.esu.api.EsuException: The request timestamp was outside the valid time window.
        at com.emc.esu.api.rest.EsuRestApi.handleError(EsuRestApi.java:1808)
        at com.emc.esu.api.rest.EsuRestApi.createObjectFromSegment(EsuRestApi.java:234)
        at com.emc.esu.api.UploadHelper.createObject(UploadHelper.java:137)
        at com.emc.esu.api.UploadHelper.createObject(UploadHelper.java:106)
        at Cloud.UploadCloud(Cloud.java:40)
        at Test.main(Test.java:24)
Java Result: 1

Any ideas?