While binding data to RadTreeView I am getting an error
"These columns don't currently have unique values."
Below is the dataset which I am binding to RadTree
ParentID ChildID Label Visible Type
NULL 1 Category true Category
NULL 2 Brand true Brand
NULL 3 SubBrand1 true SubBrand1
NULL 4 SubBrand2 true SubBrand2
1 1_52 1_Consumer false Category
1 1_53 1_Business false Category
1 1_54 1_Total false Category
1 1_72 1_Sprint false Category
1 1_73 1_Nextel false Category
1 1_189 1_SprintNextel true Category
1 1_190 1_ATTCingular true Category
1 1_191 1_ATT true Category
1 1_192 1_Cingular true Category
1 1_193 1_TMobile true Category
1 1_194 1_Verizon true Category
2 2_137 2_Sprint false Brand
2 2_138 2_Nextel true Brand
2 2_224 2_Business true Brand
2 2_225 2_Consumer true Brand
2 2_226 2_Total false Brand
3 3_246 3_Wireless true SubBrand 1
4 4_194 4_Total true SubBrand 2
"These columns don't currently have unique values."
Below is the dataset which I am binding to RadTree
ParentID ChildID Label Visible Type
NULL 1 Category true Category
NULL 2 Brand true Brand
NULL 3 SubBrand1 true SubBrand1
NULL 4 SubBrand2 true SubBrand2
1 1_52 1_Consumer false Category
1 1_53 1_Business false Category
1 1_54 1_Total false Category
1 1_72 1_Sprint false Category
1 1_73 1_Nextel false Category
1 1_189 1_SprintNextel true Category
1 1_190 1_ATTCingular true Category
1 1_191 1_ATT true Category
1 1_192 1_Cingular true Category
1 1_193 1_TMobile true Category
1 1_194 1_Verizon true Category
2 2_137 2_Sprint false Brand
2 2_138 2_Nextel true Brand
2 2_224 2_Business true Brand
2 2_225 2_Consumer true Brand
2 2_226 2_Total false Brand
3 3_246 3_Wireless true SubBrand 1
4 4_194 4_Total true SubBrand 2