This
guide has a section specifically for modchipped users. I highly recommend following this guide. Also if you want to know what chip is inside your console, you can remove the SD card and try to boot the console; different error messages point to which type of chip you have. Although, once the chip is installed, they all function identically. The only meaningful difference in the chips is how to install them.
Do you have the patches on your SD card? If not, you can download them from this
thread.