Correct me if I am wrong

If i have the aux class defined via schema extensions
I have a LOOPBACK driver that looks to see if workforceID is populated
if it is then the boolean attribute thats part of the new aux class is
set to YES

both the workforceID and the auxclass attribute (aux class is STUattr
with the attribute being STUisStudent as boolean)

BUT

I get 608 ERR_ILLEGAL_ATTRIBUTE for every account

AM I missing something?