5150 fax default - print confirmation

Hello,

We have a Xerox 5150 Workcentre model that will not consistantly print out a confirmation after a fax goes through.  The only way to get it to print is to go to Fax; Added Fax Features; Fax Sending Features; Transmission Options; Transmission Report; then checking the radio button to "on".  

Then it will print one; but after that fax it defaults right back to the 'off" position.  

Our work around has been to print out the whole transmission list afterwards, but in our office this is very inconvenient.

Please help!!