SONY VAIO VGC-RC204, NETWORK WIRELESS PROBLEM

Hi, firstly I would like to congratulate you on an excellent Website, it's very helpful to me being a novice and having a problem reading. My question is; I purchased a new pc Sony Vaio VGC-RC204 AND I'm TRYING TO network IT WITH MY old PC. The problem my friend is having is that I had purchased a Belkin Switch 2 wireless switch. Having the wireless Keyboard & Mouse we are finding that the Switch starts Switching between the 2 PCs and presume that there is Interference between the UNIT & KEYBOARD and MOUSE. Extremely annoying as Sod's Law says that it is always at a Point where I am in the middle of something very important. We have been looking for a USB to PS/2 switch that would accommodate both the KEYBOARD, MOUSE and would allow Audio from my SONY right now. Could you please help by suggesting any way of getting round my problem. Many Thanks,Regards, Peter
ps; I hope that you can understand this message as my medical problem makes it very difficult to write in an eligible manner.(this has taken me 2 days to write this message.