Something is kicking rtorrent process

[abc-cpu]

I have transfered successfuly about 25 GB and rtorrent starts crashing. After 20-60 minutes rtorrent process is disappearing. I have nothing in router's log under webadmin. Other processes like mounting /opt, webserver, rutorrent are still working. I must restart rtorrent only. What and where I should check to find the cause ?

PS. I have external new 320 GB 2,5" disk with two partitions in ext2 with external power supply (ATX with about 7A on 5V).

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ASUS WL-500gP V1 Tomato 1.27 ND USB EXT 8744 + OptWare + rtorrent 0.8.6 + rutorrent 3.0

[Copter]

Do you have a swap-partition? Is the swap on?

If you have 7 big torrents running without swap, you can be happy it only crashes every 20 min

[abc-cpu]

I had similar problem without swap but I successfuly created and mounted (128 MB).Worked fine about 18 hours and then started crashing. I'm newbie so if you have any sugestions to put logs then please give me places where I can get them.