Current security context is not associated with an active directory domain or forest

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C#

ASP.NET

I want to get the list of domains available on the network. It runs perfectly on my local desktop. But upon deploying, the following error occurred:

Current security context is not associated with an active directory domain or forest.

Any help?

Here is the code i used:

List<string> DomainList = new List<string>();
              var forest = Forest.GetCurrentForest();
              foreach (Domain dm in forest.Domains)
              {
                  DomainList.Add(dm.Name);
              }

Thanks in advance!