No such method getCapacity

So yeah i was creating a program so i can see how much energy i have in my 2 Mfsu's via terminal glasses from open peripheral addons!

I recieved the error:

Untitled:32: No such method getCapacity

http://pastebin.com/Yf3yYybU

OR

local bridge = peripheral.wrap("right")
local net = peripheral.wrap("back")
bridge.clear()
local width = 200
local storageUnits = {
{
["id"] = "mfsu_0",
["name"] = "Mfsu #1"
},
{
["id"] = "mfsu_1",
["name"] = "Mfsu #2"
}
}
local offset = 0
for key, storageUnit in pairs(storageUnits) do
pxOffset = offset * 20
storageUnit["label"] = bridge.addText(4, 4 + pxOffset, storageUnit["name"], 0xFF0000)
storageUnit["bar"] = bridge.addBox(4, 14 + pxOffset, 0, 5, 0x00CC00, 0.9)
storageUnit["bg"] = bridge.addBox(4, 14 + pxOffset, width, 5, 0x0033CC, 0.5)
offset = offset + 1
end
while true do
for i=#storageUnits,1,-1 do
storageUnit = storageUnits[i]
if net.isPresentRemote(storageUnit["id"]) then
capacity = net.callRemote(storageUnit["id"], "getCapacity")
amount = net.callRemote(storageUnit["id"], "getStored")
storageUnit["bar"].setWidth(width / capacity * amount)
end
end
sleep(0.5)
end

Trying checking the actual method name with the docs program in the openP folder on the computer. most of the method names have been changed once, so you might be using an outdated one.