H1B visa apporved and changed to intial review


On July 19, 2013, we mailed you a notice that we have approved this I129 PETITION FOR A NONIMMIGRANT WORKER.

But now status changed to Initial review On August 14, 2013,

your address was changed relating to the I129,

PETITION FOR A NONIMMIGRANT WORKER that you filed.How many day they take for changing address.

Please help me in this regards.