PUT THE CORRECTION TAPE ON CORRECTLY
First, remove the ribbon. Now look at the left side of the printhead. (thats the unit that moves back and forth) You will notice that, above the spindel that you put the correction tape on, and towards the platen, on the black plastic, there is a recessed flat place about the width of the correction tape with slight serrations in it. This is the guide for the corr. tape. There is one like this on the right side also.
Put the corr. tape on the spindle, keeping slight tension on the tape, give it a 1/2 turn so the underside (dull) side is facing to the left, and put it in the guide. Then you put the tape behind the two metal "fingers" that are sticking up in front of the printwheel, and then into the guide on the right side. Then put the other corr. tape spool on the post on the right side, and turn it until the red "leader" on the tape is past the middle of the printwheel. The dull side of the corr. tape is the side that does the corrections, so make sure that side is facing towards the platen. Make sure the ribbon goes behind the metal fingers also. The tape and the ribbon should both be between the fingers and the metal cardholder.