Unable to connect Xperia-Tipo to PC?

For last 2 days, I am trying to connect my new Xperia-Tipo phone to PC but unable to connect. My PC's OS is Windows XP - SP3. When I connect to PC, it is asking for PC companion installation. But when I double click on Setup.exe its doing nothing.So I downloaded PC companion (Version 2.1) and I tried to connect, but its not detecting my phone. In trouble shooting its saying please check its properly connected or not. Yes its connected and my phone is charging too. I switch off my phone & tried its waste of time. If i see in my computer its...Read more