Rednotebook opens .txt-files in the terminal and not with texteditor

When I create a new .txt-File on my notebook in my RedNotebook-Journal - directory "/home/paul/.rednotebook/data/Files" and set a link to this file it will be opened with the LXTerminal. The existing .txt-files - also created directly in the "/home/paul/.rednotebook/data/Files"-directory on my PC - will be opened regularly with GEDIT (my texteditor). The strange thing is: when I copy an existing .txt-File - created on my PC - rename it and set a link to this file - it will be opened with gedit! Also when I create a .txt-file in this directory on my PC it will be opened with the texteditor: on the PC AND ON MY NOTEBOOK! Only when I create a .txt-file on my Notebook this "terminal-malfunction" happens... very strange! PC-OS is UBUNTU with UNITY, NB-OS is LUBUNTU with LXDE. And here the last two lines from the rednotebook.log:
2013-02-10 14:02:34,927 INFO Clicked URI "file:///home/paul/.rednotebook/data/Files/test.txt"
2013-02-10 14:02:34,928 INFO Trying to open file:///home/paul/.rednotebook/data/Files/test.txt with xdg-open
Okay, I solved this problem by this way: I took an existing .txt-file, named it "template.txt" - and use this after given the name I want, when I need a new .txt-file with a link to this file - but this is not a smart way...
Do you know, why Rednotebook show this behaviour only on my Notebook but not on my PC?
I would be very grateful for an answer!