Interleaved 2 of 5 gives errors!

I am using itextsharp to generate Interleaved 2 of 5 gives errors! barcode.But it gives error that "The Text Length Must Be even".Please help me on this.

BarcodeInter25 codeint2of5 = new BarcodeInter25();
codeint2of5.CodeType = Barcode.CODABAR;
codeint2of5.ChecksumText = true;
codeint2of5.GenerateChecksum = true;
codeint2of5.StartStopText = true;
codeint2of5.Code = barcodeText;
System.Drawing.Bitmap bm = new System.Drawing.Bitmap(codeint2of5.CreateDrawingImage(System.Drawing.Color.Black, System.Drawing.Color.White));
bm.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Gif);