All of the DS2000 CPU cards are labled DX7NA-LCCPU-A1. The stock number is the real identifier. There were 3 different LCCPU cards released over the years, all with different memory configurations:
80025 - Version 1 software
80025A - Version 2 software
80025B - Version 3 software (required for IntraMail)
If the system is running 3.21.00, then it's an 80025B and it supports IntraMail.
Your problem is with either the DSPDBU (the daughterboard the CF card is on) or the CF card itself. You must use an NEC DS-Series IntraMail card with this system, a generic CF card will not work. (IntraMail cards are copy protected.) I recommend the following:
1) Download and install the latest IntraMail utility software. (
https://ws1.necii.com/ds2000/d2kdownloads/d2k%20files/software/software_updates.html#Anchor-47857)
2) Click "Select" and make sure the data fields in the "IntraMail Card" section are correct. If they are, your IntraMail CF card is good. If not, you should contact the seller.
3) Click "Initialize" to restore the card to the default condition.
If this is successful and the card still does not work, you may have a problem with the DSPDBU card.
I hope this helps.