Chart coded through VBA sometimes displays itself sometimes not.

Hi,

I am working on a project where I calculate probability distributions of certain data you can see in this file: https://docs.google.com/file/d/0Bwjh...it?usp=sharing

1. I calculated the intervals with the frequencies for each interval data.
2. I cumulated them and placed into the array results2

3. I display each of them in the SAME graphic.. but HERE I get a problem... Sometimes the code works, and sometimes I get a With End block ... sometimes even only ONE curve displays.. it's really annoying. Could anyone please help me with that?

ALL is supposed to be ont the same graph*

My chart VBA code:

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Yeah, I didnt know where to place it :S