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

Interesting, I have an AMD 800 mhz with 256 meg RAM, GF3 Ti200 and have similar "slow downs" though most seem to be after about 4 hours of flying during a 10 hour flight. Have you tried to reduce the load on the system like exiting all other unnecessary apps / services, decreasing the sliders in FS, etc..?