ISM on IDS7.30.UC3 - problems

IDS 7.30.UC3 on IBM AIX 4.3.4 using IBM 3570 Multi Tape Loader I've recently been asked to install ISM on a customer site but have had absolutely no success. I get as far as the "ism_startup -init" when its starts to report some problems. I havn't installed ISM on UNIX before but when I installed it on NT it worked so easily that I thought that I must have done something wrong. Piece of piss !! The IBM host name (when you issue the 'hostname' command from the command line) is '0' (yes, thats right, Zero). Checking smit/comms/TCP/IP/Basic startup reveals the hostname of the machine is '0' (zero). Within /etc/hosts there isn't an entry for '0'. The IBM box is also affectionately known as 'f50' and 'rs6000' for which there are entries. I have tried adding a '0' to the end of the entry (so its like an alias) that contains the machines' IP address but attempting to ping '0' or ping 0 results in pinging 0.0.0.0 which results in pinging back the address of the gateway/router. Now, IDS works fine since the sqlhosts file contains the 'f50' hostname - no problems. Have any of you guys come accross this problem before or do any of you know of the restrictions in host names that can't be zeroes ? Also, is ISM really a worthy backup tool to use on IBM's ?? Any/all help is greatly appreciated Sean. P.S. I don't want discussions on the pro's and conns of Onbar and ontape - I've already been through that one.