"string is too long" in aTorrent app!

Hi, I use aTorrent pro app 1.5.4 version to download files but for some files .torrent, when I add them into the list, I get an error message that says "strings is too long".
How I can fix the problem?

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At link [Only registered and activated users can see links. Click Here To Register...] you have the message that I get from aTorrent app.
I have tried time change the filename .torrent because I had thought at filename string too long...but I get the same message..

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