請問xiaobaitu: FP issue, thank you

I filled my I140/I485 at August, 2005, and did not received FP notice yet, I worry about it, I got I485RFE last month, and they did not ask me for FP too. I am wondering if I can call the 1800 number to schedule a time for my FP directly, instead of waiting a FP notice from USCIS?
Thank you very much.
my information:
I140/I485 NIW RD august 2005, I140 RFE Vov. 2005, I140 AD Dec 2005, I485 RFE June 2006.
Thank you for your response!!