if the OP used it correctly. Sounds like he just needs to poll for the end of the write cycle.

If you're using this memory for non-volatile storage, look at the data sheet to see how to properly write to it. It takes several milliseconds after a write cycle for the device to store the data and be ready for another read or write. You can read and check a poll bit to determine when the write has finished.

If you really need something that works like RAM, see the previous post. But if this suits your purpose you can use the AT28C64B.