I used a sniffer (WPE pro, the standard Network-game hacking software) on it, you might want to use some basic encryption on it, ie. include a checksum using a unique algorithm to make sure that the packet isn't modified. Like this> send packet= abc:cba:12 (user=abc password=cba checksum= [a=1]+[b=2]+[c=3]) don't use such a simple encryption algorithm as this, but you get the idea.
Also, I detected (using WPE Pro again) that the IP it sends the packet to is 209.54.62.175, I typed that into the URL bar and I comes up with Access Forbidden! but if I go to 209.54.62.175/agk/ it has the directory listing,
very bad. Create a file (index.htm) in [serverfiles]/agk/ and put something like "AGK Content Place Holder" in it (the file)