array formula turning off on different computer

I have a workbook that I made on my computer and everything works fine but when I gave the program to another person or tried it on another computer of mine all the array formulas stopped working. If I went back in and re entered the cntr+alt+enter then it started working again. The odd thing is that it shows the formula as an array formula (with the {} around the formula) but it didnt work until I re-entered it. Any ideas why this is happening? My program is very large (80 meg) so I cant post a copy here and i wonder if its size is causing issues.... LOTS of calculations going on.

Edit: It all started when I added a bunch of formulas like this

Formula:

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not sure if it matters or not but thats when everything stopped working.

I have not heard of this problem before but your file is rather large and the size of the file could be a complicating factor. What are the differences in CPU and also in the version of Excel you are using on the two different computers?

Do you have calculation set to Manual or Automatic?