Bukkit

What steps will reproduce the problem?
1. Trying to set different types of blocks for streetBlock or motorwayBlock
2.
3.

What is the expected output? What do you see instead?
It is unclear why adding in entries under these headings seem to have no effect (i.e. putting - 2 for grass does not enable me to put a minecar on grass)

What version of the product are you using?
2.4, latest at the moment from bukkit downloads

Do you have an error log of what happened?
No output is displayed.

Please provide any additional information below.
I believe this might be due to the fact that I have the option useWool: true, but since there are almost no comments as to what each option does (the ones that aren't completely obvious) it's hard to say for certain if merely enabling or disabling this will produce the wanted effect.

Follows is the config.yml in entirety:
# MineCars V2.3 Config File
destroyCar: true
placeMinecart: true
UseExhaust: true
UseOwnership: true
RailingBlock: 101
street-speedfactor: 7
motorway-speedfactor: 12
StreetStepType: 0
useWool: true
WoolColorStreet:
- GRAY
WoolColorMotorway:
- BLACK
streetBlock:
- 1
- 2
motorwayBlock:
- 4
UseFuelSystem: false
UseEconomy: false
priceperfuel: 15
fuelitemid: 263
itemsperfuel: 5
UseLicense: false
LicenseCost: 10000