There are two ways to Sprint on the Buxville server.
The first way is the vanilla Minecraft way available to everyone. To do this people just double tap the W key to go at an increased pace for a while. A more detailed how to is below.
1) Use the vanilla Sprint, double tap your W key to enable.
2) If you are a donor, you will receive a speed potion boost upon double tapping W.
Use the Donor Sprint, double tap your W key to enable.
If it worked you will be going faster and have a particle effect coming off of you, with the self enchant Speed I.