thanks for your reply.
A last question :
should i consider that current-timestamp is a host variable or not ?
I try to code this sentence and change current timestamp by current-timestamp but i think (if my memory is good that it doesnt work)
BUT in spufi, it works.
Are you really sure that replacing current timestamp by current-timestamp without the ':' caracter before current-timestamp works well ?
I'm not in the office tomorrow and i would resolve this problem monday morning.