I can't OP myself in my OWN Bukkit server?

Ok so i have been hosting in a Vanilla Minecraft server for a while now prob about a year and a half now and i have been looking at Bukkit severs and i wanted to try this out so i started a Bukkit server… But… I can't OP myself! I have tried everything like i have tried to do it the same way i did it for a Vanilla where you just enter your name into the ops.txt or type "op name" in the sever console but this does not work. After this i looked over a lot of forms and many say to try and use Permissions Ex or GroupManeger i have tried both they didn't work… I did everything exactly like the tutorials and nothing. I even set the default group to have permissions to all commands and i still can't use commands in game on my server. Can someone help me because this is really getting on my nerves.

I'm not sure where you're hosting. But I'd recommend using MC Pro Hosting. Really simple commands and how-to guides over on their website.

I'll also include a link for their site: .php? Aff=4890

Try putting "op [yournameherewithoutbrackets] into the command prompt from which your server is running. Try putting your name into the op.txt file a few different ways (capitals, no capitals) and see if it works. Don't forget to reload your server after using any of the methods. If anyone else I sopped on your server, try asking them to op you. Hope this helps!