I am trying to open a txt file (the textfile contains coordinates. It has a x and y column) within ArcMap 10.0. But everytime I want to open it (Add data --> Add XY Data) the software does not show me the X and Y field. Even when I try to open the txt via Data -> Add Data --> Add Data I get an error message "General function failure". Even when I try to create a txt file like done in http://resources.arcgis.com/en/help/main/10.1%20/index.html#//005s00000010000000 I am experiencing the same problems. The same happens also if I convert the txt to csv.
Does anybody have an idea why I can't open any txt file in Arcmap?
Edit: I can open the file in ArcMap on my computer at home. Only on my works computer I am experiencing the problem that I can't open any text file. Any ideas?