Dropping table

I'm trying to drop an empty table that has a check constraint and I receive the following error:

"ISC ERROR CODE:335544351

ISC ERROR MESSAGE:
unsuccessful metadata update
MODIFY TRIGGER failed
action cancelled by trigger (1) to preserve data integrity
Cannot update trigger used by a CHECK Constraint"

What is the correct order of the "drops" and WHY does this happen ?? After all it is an empty table !!

Solved it
ALTER TABLE xxxxxx DROP CONSTRAINT xxxxxx