In reply to haithamx15:
You might have 2 problems.
First, you do not store a copy of your seq_item, i.e. if you are generating a new one the old one will be overwitten.
Secondly, I do not understand why you are using a mailboy or a queue. You do not need a storage elemenr there. A seq_item will be generated in 8 time, i,e, it is immediately available when you need one.