CUMIPMT function error
 

I have excel 2003. I sent via email a worksheet to my office.
It is a worksheet that calculates various rates of return, NOI, CAP rates,
Return on Cash, etc.

Now when I make a change of any kind, the 'INTEREST' cell displays "#NAME".

I have done the 'tools', 'add-ins', 'Analysis Tool-Pak', and it does show
the items checked.

I still cannot get this to work. I even shut down the computer and
restarted, thinking it needed to 'apply', but to no avail.

HELP!!
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Thank You
mjb