how long can I receive the receipt notice of my I-485 applicatio

I ted my I-485 application on 05/22/07, and the CIS already received it on 05/24/07, but so far, the CIS did not withdraw my application fee from my bank and I did not receive the receipt notice. If you ted your application to Nebraska service center, could you tell me how long you receive the receipt notice of I-485 application? Thanks millions.null