error in custom control from the 1.4.84

The object not support the property or method ‘setParent’; error from web page.

the custom control is composed by :

Friend WithEvents SplitContainer1 As Wisej.Web.SplitContainer
Friend WithEvents txtSearch As Wisej.Web.TextBox
Friend WithEvents btnSearch As Wisej.Web.Button
Friend WithEvents Label1 As Wisej.Web.Label
Friend WithEvents dg As Wisej.Web.DataGridView

The error fired when I put the control into another but I can open  it at design time without error.