Currupted AppleWorks Files

This is my first post here I hope it goes well. Ok, I have an old G3 tower with 512 ram and a small 6 gig harddisk It is running OSX server on a small network - 7 Mac OSX workstations, 3 of which use an airport I inherited this network about 2 months ago when I started my new job. This is my first MAC server experience but I have found it similar to other networks I have worked on. Anyway I am experience random corrupted Apple Works files which are linked via a calendar app. The files all reside on the server which is running DRIVE 10 and VIREX ...everything seems ok diagnostically. I am trying to simulate various client scenarios to observer the problem..but I have found no pattern. So I want to ask .... IS MY SERVER OVERTASKED and UNDER POWERED - I say yes..my boss says no..so read below and then tell me what you think please: My server is- serving appleworks files for 7 clients- about 250 of them accessed throughout the week in various orders hosting the local intranet hosting a VPN to our other office it has QT streming enabled because we have 3 movies which we sometimes show via the intranet Bandwidth 100Mbs per second fiber coming in. 4 port Corega Router (I am in Japan so u may not know the model it is like a small DLink or Lynksis). 3 hubs to allow The airport and 2 other computers to connect. Misc Maybe during the day one computer is streaming ITUNES audio in the lobby at 128k . Sorry for the length Tony D