Another work around.

declare @foreignkey sysname

declare @referencingtable sysname

declare @cmd sysname

DECLARE fkey_cursor CURSOR FOR SELECT object_name(constid), object_name(fkeyid) from sysreferences

OPEN fkey_cursor

FETCH NEXT FROM fkey_cursor INTO @foreignkey, @referencingtable

WHILE @@FETCH_STATUS = 0

BEGIN

select @cmd = 'alter table ' + @referencingtable + ' drop constraint ' + @foreignkey

print @cmd

exec (@cmd)

FETCH NEXT FROM fkey_cursor INTO @foreignkey, @referencingtable

END

CLOSE fkey_cursor

DEALLOCATE fkey_cursor

GO