Do you have a yahoo username and password?
I also do not see the 8300 listed below.
16 MB BlackBerry smartphone with a color screen (BlackBerry® 7100 Series, BlackBerry® 7200 Series, BlackBerry® 7500 Series, BlackBerry® 7700 Series, BlackBerry® Pearl™ smartphone, BlackBerry® Curve™ smartphone, BlackBerry® 8700 Series, and BlackBerry® 8800 series), and OS v3.6.0 or higher (Go to Options -> About to find your device's handheld version. If you are not running OS v3.6.0 or higher, visit your Service Provider's website)
301 kB (301000 bytes) of free memory (Go to Options -> Status to find your device's free memory) A Yahoo! ID and password (You can obtain a Yahoo! ID by visiting http://edit.yahoo.com/config/eval_register)
BlackBerry data service*