Visual Studio Question - ambiguous references

Why does the editor complain about certain lines of code and want to put this in to resolve ambiguous objects ?

It also put something about “swf” up at the top of the code sometime -not sure if its when i’m adding events on controls via the editor or what ?

using DataGridViewRow = Wisej.Web.DataGridViewRow;
using DataGridViewCellEventArgs = Wisej.Web.DataGridViewCellEventArgs;

private void dgv_BusinessServices_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{

// Code is here

}

If I remove the “swf” reference and  comment them out inthe using clause they are then OK again without errors