Xtra Report does not showing data

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VB

DevExpress

I have created one project in vb.net 2012 (Visual Studio 2012). I have three tables.
1. Fee Report (Receipt No. Primary)
2. Fee Details (No primary key)
3. School Information

I have create one xtra report. Added one Dataset. Import 1, 2 tables. Set Primary key for 2 Table (Receipt No.). Made relation between 1 and 2 (Receipt No.). I have design report.. It is working perfectly... No error... Also Add one parameter, it is also working..

Now I have add 3 table into dataset.. There is no relation for table 3. When I insert its field into my xtrareport... No data is displaying. Xtrareport is only displaying data from Table 1 and Table 2. Not from Table 3.. please... help..

Please. Help....