i solved XD.I have had to open the file with a hexadecimal editor to discover what was wrong.The first line MUST be totally equal to the one of the imperial campaign one to prevent those bugs(or it can cause bugs at random).You should make sure (with an hexadecimal editor) that the first 6 chracater are the same(as the first one seems to be used to indicate the codification(Rome uses UNICODE anyway ;) )).At the end you should not put more than one new line on the bottom of the file as it seems to cause problems ;).
Hope this will help someone to get over the problem
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