I hate to bring this up, but by not current limiting your LED's you can not only fry you IR LEDs which are very sensitive to over current but you can draw more than the allotted current from your computers USB port and fry your mainboard.
Please read this article and redo your post with proper current limiting resistors and proper values.
http://led.linear1.org/why-do-i-need-a-resistor-with-an-led/
