After flashing the firmware on my Prism 2.5 based wireless card (Zcomax XI-325), blacklisting the orinoco drivers and enabling the hostap drivers, I am finally able to properly inject!

As of right now, I have injected 430,000+ packets at a average rate of 250 packets per second (using the stock antenna).

Just now, aircrack has found the WEP key! My first successful WEP crack!

Thanks to all the members and their helpful posts on the subjects.