I've ran multiple servers before and I've never had this problem. I just downloaded the Technic Client and the Tekkit 3.1 from the website. After running my server and logging into it, I decided to "op willmydickfit" and it does nothing. It adds my name to the op.txt but it doesn't allow me to use OP commands on the server. I have even tried removing my username from op.txt and re-entering it manually, but it doesn't work either.
Anyone else have this problem?