Hello Sir, i have a problem while binding database into webdatatree. im encountering an error like "parent-column and child column dont have type-matching columns". in asp.net. Can you help me out for this error. Pz give me an example code in asp.net using C# for (binding data from sqlserver to webdatatree along with parent and child node). Very urgent. im using net advantage 4.0 trial. we plan to purchase it.