TextChanged event works in VC# 2010 but not VC# 2005

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C#

I was writing a small program in Visual C# 2010 to ultimately be loaded on a handheld scanner with WinCE 5. Works great in 2010.

Come to find out, I needed to use the 2005 version. So I copied my code over to 2005, and now the TextChanged event doesn't trigger. I have tried it in a regular Windows App in 2005 as well, with the same results. The data goes into the textbox just fine, but changing the text doesn't trigger the event.

I have a textBox with this code attached. I test it in Windows by just Ctrl-V the data into it and it would trigger fine. In 2010, works great, not in 2005. On the handheld, the scanner will put info in this box.

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            //only get scan if txtbox isnt empty
            if (textBox1.Text.Length > 0)
            {
                scanCode = ReadCode();
                //if scanCode == null that means it was a bad scan
                if (scanCode == null)
                {
                    button1.Text = "Wrong Barcode - Try Again";
                    button1.BackColor = System.Drawing.Color.Red;

                    //Log that someone scanned the wrong barcode
                    log.WriteLine(DateTime.Now);
                    log.WriteLine("Invalid Barcode scanned");
                    log.WriteLine("Code = " + scanCode);
                    log.WriteLine();
                    log.Flush();
                }
                else //else it was a good scan
                {
                    ProcessScan();
                }

            }
        }

Anyone know of any differences between the versions that would keep this from triggering? Any help is greatly appreciated.