Malvika, welcome to
Java Ranch!
Sounds to me like you started JBoss AS using:
run -c other
That's fine, but you have to first create the "other" configuration before you can do that. If you look under the server directory you will see all of the configurations that are available. The "default" configuration is what most people run and you don't have to specify the -c option to run it, just enter:
run
Wait. I see that you are trying to start this in Eclipse. I suspect that when you created the server in Eclipse that there was an "other" configuration, but you later deleted it. I recommend deleting that server in Eclipse and creating another one. (Actually, I really recommend that you avoid running from within Eclipse; just scan the forums where you will find numerous people having issues with using Eclipse because it tends to get in your way more than helping you.)