[Ti] Unpredictibility using Logitech USB headset with 10.4.8

[Frank Ettenberg]

Hello, I just purchased a usb Logitech premium headset to do skype.  
They say it is recommended for the OSX 10.4.6 but maybe not beyond  
that number. I have 10.4.8.  I am experienceing a lot of  
unpredictability on the part of this unit, & repeatedly have to redo  
the sound preferences & the skype preferences, any time I either shut  
down the account or remove the usb cable. Would of course appreciate  
any experienced recommendations on  how to deal with this.   I cant  
seem to predictibly get sound coming into the earphones.  It does  
appear that the microphone works, since I see signs of sound being  
read in the output window of the preferences.  Also, I am using a  
titanium g4 PB with 1.5 gig RAM.  Await your opinions / suggestions.   
Thx    Frank Ettenberg