HttpContext.Current.Cache.Add() is not working in production

Has anyone has any issues with this feature working when moving to production. It works in local, dev, and staging without any issues and hits on the exact second or so.  Any ideas on this?
 
HttpContext.Current.Cache.Add( DummyCacheItemKey, DummyCacheItemValue, null, DateTime.Now.AddMinutes(2) Cache.NoSlidingExpiration, CacheItemPriority.NotRemovable, new CacheItemRemovedCallback(CacheItemRemovedCallback) );