Matching two lines of HTML code with a web page's code?

I am using rprxoy to get the date when a player joined ROBLOX, but it seems Lua can't match two lines of HTML code next to each other to the page's code.

This is the code that isn't working:

--  I haven't included some of the other variables in this piece of code
local link = "http://rproxy.pw/users/" ..id.. "/profile"
------------------------------ important v
local cut = [[<p class="stat-title">Join Date</p><p class="rbx-lead">%.+</p>]] -- the code I am searching for
------------------------------ important ^
local html
local success,msg = pcall(function() html = serv:GetAsync(link,false) end)
if success then 
	print("works")
	local find = html:match(cut)
	if find then
		print("found")
		return find
	else
		return "Cannot Get Join Date"
	end
else
	return "Cannot Get Join Date"
end

So how would I do this? Info on the profile page often has the same lines of code, with the only difference between them being located in the %.+ I have included in the cut variable.

NOTE TO MODS: I have seen a question like this before, but I can't find it again :/