I won't hold your hand, but I'll give you the major information you need. Firstly, the server uses the 7.7 (not 7.72) RSA keys. The OTServ IPChanger changes the key to the Otserv RSA keys, so you will either need to change your system's hosts file or update the tibia server binary with the new RSA keys using a hexeditor. Secondly, the server's threading mechanism is very old; it uses LinuxThreads, whereas LinuxThreads has been deprecated by NPTL. Someone earlier posted that all you need to do was compile against the older versions of the required libraries. However, this statement is not entirely true, as LinuxThreads was implemented at the kernel level, so you will need to use an older Linux kernel. Anyway, running the server on a modern distribution using NPTL will make it look as if the server is properly running, but you won't be able to connect to it (took me a while to figure out this issue using gdb).