Run-time Error '1004': An unexpected error has occurred

Hello Guys,
i am new to macro coding, and i got a problem with this excel.
Everytime i add new code to row after 256 and Click the button "Click to download data", it will pop up an error "Run-time Error '1004': An unexpected error has occurred".
Anyone please help me how to fix this error.
This is the file: https://www.dropbox.com/s/g2ywtxf4ru...heet.xlsm?dl=1


Code in macro:
Sub GetData()

Dim QuerySheet As Worksheet
Dim DataSheet As Worksheet
Dim qurl As String
Dim i As Integer
Dim j As Integer
Dim k As Integer

Application.ScreenUpdating = False
Application.DisplayAlerts = False
Application.Calculation = xlCalculationManual

Set DataSheet = ActiveSheet

Range("C7").CurrentRegion.ClearContents
i = 7
qurl = "http://download.finance.yahoo.com/d/quotes.csv?s=" + Cells(i, 1)
i = i + 1
While Cells(i, 1) <> ""
qurl = qurl + "+" + Cells(i, 1)
i = i + 1
Wend
qurl = qurl + "&f=" + Range("C2")
Range("c1") = qurl
QueryQuote:
With ActiveSheet.QueryTables.Add(Connection:="URL;" & qurl, Destination:=DataSheet.Range("C7"))
.BackgroundQuery = True
.TablesOnlyFromHTML = False
.Refresh BackgroundQuery:=False
.SaveData = True
End With

j = Range("A7").End(xlDown).Row

For k = 7 To j

Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc. Common Stoc", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc. Common St", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc. Co St", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc. Co", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc. (The)", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc. Com", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Inc.", "")
Cells(k, "C").Value = Replace(Cells(k, "C").Value, ", Incorporated C", "")

Next

Range("C7").CurrentRegion.TextToColumns Destination:=Range("C7"), DataType:=xlDelimited, _
TextQualifier:=xlDoubleQuote, ConsecutiveDelimiter:=False, Tab:=True, _
Semicolon:=False, Comma:=True, Space:=False, other:=False


'turn calculation back on
Application.Calculation = xlCalculationAutomatic
Application.DisplayAlerts = True
' Range("C7:H6000").Select
' Selection.Sort Key1:=Range("C8"), Order1:=xlAscending, Header:=xlGuess, _
' OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom
Columns("C:C").ColumnWidth = 25
Rows("7:6000").RowHeight = 16
Columns("J:J").ColumnWidth = 8.5
Range("h2").Select

End Sub