Solution: Slow down the transmit speed on the reader.  Use Windows notepad to repeatedly swipe credit cards to verify that the data is received the same, each time the card is read.

Note: If you are using Fedex Ship Manager software you will need to set the Transmit speed to about 3.  Fedex Ship Manager has a tendency to eat keyboard keystrokes in applications when it is running in the background. If you find this hard to believe, try typing some words on the computer as fast as you can. You will notice that some of the keystrokes do not come through.  It is for this reason that you must slow down the transmit speed on the reader to a 3.

Programming with the Keyboard

Steps: With your keyboard connected to the card reader and using Windows notepad or some other program you can type in, follow these steps:

1. <Left Ctrl> <3> <Right Shift> <Enter> 
2. The reader will issue a series of beeps indicating that it has been reprogrammed. Each time you press this key combination the reader will slow down the transmit speed.  Once the speed has hit the slowest it will put the speed at the fastest and begin to slow it down again for subsequent keypresses.
3. Test your card output in Windows notepad, if this did not fix the issue then repeat the key combination and retest until the speed is sufficiently slowed to properly transmit the card data.

-OR-

Programming with the Universal Programmers Software

Steps: After downloading and installing the Universal Programmer software, you will want to run it and follow the steps below:

1. Press F1 to display the Interface settings dialog.
2. Use the Tab key or the mouse to position the cursor over the Transmit Speed settings
3. At this point you can simply type in the new transmit speed, higher is slower, or use the up down arrows on the window to change it
4. Once you get the Transmit speed set to the setting you desire Click on the Ok button to save in memory.
5. If the software does not prompt you to send the configuration to the reader you may click on the Send button on the Toolbar or you may choose the Send Configuration option from the File menu.  The reader will beep and you will see a progress bar run across the window indicating that the configuration is being sent to the reader.
6. Test your card output in Windows notepad, if this did not fix the issue then repeat Steps 1 through 4 but increase the transmit speed value each time.