Creating of new table with help OpenXml and writinig to it.

Hallo.

I create 5 same copies of table in document. They create without problem.

For poc = 0To 5

               Dim tableAsNewTable(doc.MainDocumentPart.Document.Body.Elements(Of DocumentFormat.OpenXml.Wordprocessing.Table)().ElementAt(0).CloneNode(True))

               Dim mainDocumentPartAsMainDocumentPart = doc.MainDocumentPart()

               Dim bodyAsBody = mainDocumentPart.Document.AppendChild(NewBody())

               Dim paraAsParagraph = body.AppendChild(NewParagraph())

               Dim runAsRun = para.AppendChild(NewRun())

               run.AppendChild(table)

               'run.AppendChild(New Break())

               mainDocumentPart.Document.Save()

           Next

The problem start, when i want to write text to table. 

For poc = 0To 6

               Dim tableAsTable

               Dim rowAsTableRow

               Dim cellAsTableCell

               Dim pAsParagraph

               Dim rAsRun

               Dim tAsText

               table = doc.MainDocumentPart.Document.Body.Elements(OfTable)().ElementAt(poc)'it show me error here, during second cycle!!!

               row = table.Elements(OfTableRow)().ElementAt(1)

               cell = row.Elements(OfTableCell)().ElementAt(0)

               p = cell.Elements(OfParagraph)().First()

               r = p.Elements(OfRun)().First()

               t = r.Elements(OfText)().First()

               t.Text = poc & "XYZ"

           Next

Text write only in to table, that was already in document. I use this table as template.

When i write text  to first created table, this table shows error.

table = doc.MainDocumentPart.Document.Body.Elements(OfTable)().ElementAt(poc)

Additional information: Specified argument was out of the range of valid values.

It looks to me, as if it can't find these new tables for writing text. What i am doing wrong during creating tables? When i manualy coppy tables to document, it write text to it correctly. Problem is only when i create them through my code .

Thank you for your answer.