updatefunction gives error

CDTitleOnCommand=draworder,106;shadowlength,1;zoom,0.75;diffusealpha,1;zoom,0;bounceend,0.35;zoom,0.75;spin;effectmagnitude,0,180,0;queuecommand,"Resize";
CDTitleResizeCommand=%function Update(self) \
    local height = self:GetHeight(); \
    local width = self:GetWidth(); \
    if height >= 80 and width >= 80 then \
        if height >= width then self:zoom(80/height); \
        else self:zoom(80/width); \
        end \
    elseif height >= 80 then self:zoom(80/height); \
    elseif width >= 80 then self:zoom(80/width); \
    else self:zoom(1); \
    end \
    self:SetUpdateFunction("Update"); \
end;