Well from what you have said, basicaly the only people who can help you are the server supplier.
For us to help you we need to know what version off the config file you are using because there are combatbilty issues eg you cant use a .80 config with .55 incubus etc.
The quote about 'not editing the config' and 'angry people' to be honest is crazy, i understand you being new to it all but the facts are
You have paid you money
It aint working
Your config can not be edited (For the life of me i dont know why, but i have my ideas)
I would ask to see the config, you can edit the servers to something unknown (but i have no real intrest in whats in the unedited version to be honest.)
Have you asked the payserver for help? If you have and they are not willing to help you are runnning out of options, so maybe accept the help that has been offered.
I would delete all the evidence of incubus or better still reimage, install incubus .55 (from feed back i hear this is the most stable version.) Then use the corecctly made config file and ftp it to /var/bin/.
Si