Aqua Rite Salt values

I have tried to reset the salt value on my Aqua Rite control.  I have replaced the salt generator and when I turn it on the value reads 2900. I have had the salt commercially tested it is reads 3200.  I have tried to change the value using the instructions on your site, however it does not change and as soon as i get out the salt value reads HI and the generator turns off.  Help