Alter Table Nocheck Constraint Still Some Dependencies

Hi.

I'm getting errors like this when I try to run an upgrade script I'm trying to
write/test:

altering labels to length 60
Server: Msg 5074, Level 16, State 4, Line 5
The object 'ALTPART_ANNOT_ANNOTID_FK' is dependent on column 'label'.

I used this to bracket my script:

sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
go
sp_msforeachtable "ALTER TABLE ? DISABLE TRIGGER all"
go

/* updates here */


sp_msforeachtable @command1="print '?'",
@command2="ALTER TABLE ? CHECK CONSTRAINT all"
go
sp_msforeachtable @command1="print '?'",
@command2="ALTER TABLE ? ENABLE TRIGGER all"
go

I guess the alter table nocheck constraint isn't disabling the fk's
completely?
Is there a way around this, or do I manually have to do the constraint
dropping/recreating?

Thanks
Jeff Kish