as crazy fool says a little test to try is try your cline in his receiver at his address, if your cline works in his box at his address its down to your fathers cline and a provider problem.
well you were able to connect to the internet through the box.
that sounds like your network is fine.
what does the cccam info page looks like under the servers tab?
it could be a problem with your cline provider, he could have locked the ip address as previously mentioned without knowing.
i can give you a cline from my server if you want to rule that out...
Been there done that
At this stage it must be a firewall/router problem although if thats the case why were you able to download from the ppanel then???