list manipulation - Fitting multiple peaks

I am using the code found here to fit multiple peaks of a large dataset which I don't know anything about. This was the only code I could find on the internet to do such a thing. So this is my attempt (it is pretty much the same code with the beginning deleted and a residual plot added) of a certain dataset and the results are good, it gets the correct number of peaks and it works.

However when trying it with a larger dataset, and the one I actually need to analyze, the code fails (it gives a lot of errors). I am guessing there is only a small technical error in the code or dataset somewhere. This is the dataset I need to analyse. That data was made by importing a text document and transposing it with integers.

The data:

data = Uncompress@Import["http://pastebin.com/raw.php?i=hkhuyvza"];

Peak function:

peakfunc[A_, μ_, σ_, x_] = A^2 E^(-((x - μ)^2/(2 σ^2)))

Model:

Clear[model]
model[data_, n_] := 

 Module[{dataconfig, modelfunc, objfunc, fitvar, fitres}, 
  dataconfig = {A[#], μ[#], σ[#]} & /@ Range[n];
  modelfunc = peakfunc[##, fitvar] & @@@ dataconfig // Total;
  objfunc = 
   Total[((Sqrt[data[[All, 2]]])/
       data[[All, 
         1]]) (data[[All, 2]] - (modelfunc /. fitvar -> # &) /@ 
         data[[All, 1]])^2];
  FindMinimum[objfunc, Flatten@dataconfig]]