Vb.net 2017 paramter to report

In Visual basic.net 2017

I have an Report called "Servicereport" in this report i have added an parameter that i gave the name "reg"

I drag the parameter into the reportform so i get a textbox.

In my application i have in form2 an textbox called "RegnrTextBox" that are conntected to a access database.

I simple want to transfer the text from my textbox"RegnrTextBox" to my parameter in the report

Ive tried the following

Imports Microsoft.Reporting.WebForms

Private Sub ReportViewer1_Load(sender As Object, e As EventArgs) Handles ReportViewer1.Load
Dim p As ReportParameter
    p = New ReportParameter("Reg", Form2.RegnrTextBox.Text)
    ReportViewer1.LocalReport.SetParameters(p)
End sub

Did not work.

HResult=0x80004002 Message=Unable to cast object of type 'Microsoft.Reporting.WebForms.ReportParameter[]' to type 'System.Collections.Generic.IEnumerable1[Microsoft.Reporting.WinForms.ReportParameter]'. Source=WranglerMangement

Also tried a simple line

Servicereport.SetparameterValue("reg",Form2.RegnrTextBox.Text);

no luck their either.

any more suggestions ?