About h1b approved petition transfer?


I came to US on H4 visa few months back .

The company where my spouse is working has applied to my h1 visa and got approved.

Now i have approved petition, but still i didnt get my appointment form the company and still not started working.

The question, recently i had interviewed by client company(Client to my spouse working company)and they are ok to give direct employment to me.

So, at this situation please let me know whether i can transfer my petition to new employer with out any problem.(Presently i am not an employee of any company but have approved petition from oct1st,2012.)