Thanks for your response.
I had used STICK on OSX to determine my existing firmware version. It then downloads the correct version of CHDK for my firmware. i them copied that onto the card and put the card into my camera. I followed the correct starting procedure by using the play button and searching for the CHDK firmware update. I did not find it.
I think the problem might be is that I am using a 16gig card. I just read this that older cameras want a smaller boot.
For Cameras Released Before 2011 :Edit
With older cameras, the best booting method options depends on the size of the SD card. For cards 4G in size or smaller, the card needs to be formatted as FAT16 and configured to be bootable. For cards 8G or larger, you will need to create two partitions - a small 500K FAT16 partition configured to be bootable and a larger partition formatted as FAT32 to take up the rest of the space on the SD card.
Not all cameras support dual partitions. Check the wiki page and forum porting thread for your camera before trying to use dual partitions.
Configuring any SD card to load CHDK via the card lock booting method requires these three steps :
Setup the SD card by creating either a single partition (FAT16) or two partitions (a small FAT16 and a larger FAT32).
Modify the boot block of the first partition on the card by inserting the text string "BOOTDISK" at offset 0x40.
Copy the "Complete" CHDK executable distribution to the correct places on the SD card. For single partition cards, all the files and folders from the CHDK distribution file belong on that partition. For dual partition cards, all the files and folders from the CHDK distribution file belong on the large second partition except for the files DISKBOOT.BIN and either PS.FIR or PS.FI2, which belong on the smaller FAT16 bootable partition.
To simplify the steps listed above for the preparation of a CHDK SD card, several utilities are available. These utilities can partition and format bootable SD cards and download & install CHDK to those cards.