HoastSB.dll almost impossible to use

In reteaching myself how to connect to and use the Vatsim network, I have rediscovered something that I had discovered before --and that is that I find the HostSB .dll almost impossible to use. It bogs and slows my system down so much that I can barely even move the mouse across the screen (I have a Pentium3/1000 with 512 meg RAM and a Geforce 2 Mx video card) In the past , I had to revert to using the Standard Squawkbox Host with all of its' problems ( and I never really did understand how the standard Fs chat window fixes were supposed to work or which one to use) . The HostSB.dll certainly works better -- if only it didn't kill my system. Any help with this would be much appreciated. Barry