WoWInterface - SetFont error

Hi all
I am the author of NewbDevBox and have an issue that has reared its ugly head with the launch of Ulduar in Wrath classic.

I keep getting the following error;

Lua Code:

13x Interface/AddOns/NewbDevBox/NewbDevBox.lua:110: Usage: self:SetFont(fontFile, height, flags)
[string "=[C]"]: in function `SetFont'
[string "@Interface/AddOns/NewbDevBox/NewbDevBox.lua"]:110: in main chunk
 
Locals:
(*temporary) = NewbDevBoxTitle {
 0 = <userdata>
}
(*temporary) = "NewbDevBox\Files\OCRAStd.otf"
(*temporary) = 32

But when I check my code where I define my font object I can not see the error.
Here is my font definition;

Lua Code:

NewbDevBoxInterfaceFrame.TitleBox = CreateFrame("Frame", "NewbDevBoxInterfaceFrameTitleBox", NewbDevBoxInterfaceFrame)
NewbDevBoxInterfaceFrame.TitleBox:SetSize(NumberList.titleFrameWidth, NumberList.titleFrameHeight)
NewbDevBoxInterfaceFrame.TitleBox:SetPoint("TOP", NewbDevBoxInterfaceFrame, 0, NumberList.titleFrameGap)
NewbDevBoxInterfaceFrame.TitleBox.Text =
    NewbDevBoxInterfaceFrame.TitleBox:CreateFontString("NewbDevBoxInterfaceFrameTitleBoxText")
NewbDevBoxInterfaceFrame.TitleBox.Text:SetAllPoints(NewbDevBoxInterfaceFrameTitleBox)
NewbDevBoxInterfaceFrame.TitleBox.Text:SetFontObject(NewbDevBoxTitle)
NewbDevBoxInterfaceFrame.TitleBox.Text:SetText(TextStringList.interfaceTitle)

I am really stumped here, after 2 days of trying to fix this bug I am still not close to understanding where or what my error is.

Here is a link to my code on paste bin.

Can anyone help me in identifying my bug and how to fix it?

Yes, I am aware of the irony that the name of the addon is NewbDevBox, but I named it that way because I am the newb. :)