Intersoft DataSource Control, also known as ISDataSource, is sold as standalone component product that requires its own runtime license key. However, since ISDataSource plays a very important role in WebGrid’s data access functionality, ISDataSource is provided at no additional cost when used together with WebGrid Enterprise and WebScheduler

When ISDataSource detects a valid license of WebGrid Enterprise and WebScheduler in a web application, it will automatically functioning as licensed version. In this case, you are not required to set the runtime license key for ISDataSource in the application’s web.config.

If you would like to use ISDataSource in a web application that does not contain WebGrid Enterprise and WebScheduler (also known as standalone mode), you would need a separate license to use ISDataSource.

In my opinion, there are two possibilities that might cause this problem.

• The runtime license key of WebScheduler is not valid.
• ISDataSource is used as data source control for other control besides WebScheduler.

Hope this helps.