Abaddon, please don't post your question at three different places on the forum -- I've deleted the other two threads you have created.
Concerning your problem, I have to admit that I never use the ed2k helper app, so I don't really have much experience with it. But have you tried redoing the steps that Ken has described earlier in this thread? Maybe that already fixes your problem. If not, Ken probably has some ideas on how to troubleshoot.
For now as a workaround, you can add ed2k-links the way I do: just right-click (control-click if you have a one button mouse) the link and copy it to the clipboard. Then switch to amule and paste it in the 'ED2K Link Handler" field at the bottom of the search window and click 'commit'. Just make sure that the window is wider than the link you pasted (if you move the amule window out of the left side of the screen you can make it wider than your screen). Otherwise you'll get a message like "Invalid ed2k-link" or so.
I usually copy all ed2k links into a text file, so I can keep track of all the files I've downloaded. Btw, you can also copy'n'paste multiple links into amule in one step. I often add 5-10 links this way.