Disadvantages of Yahoo Messenger 9.0 Version

Recently I downloaded Yahoo Messenger Version 9.0 and felt very happy remembering the fact that I have downloaded the latest version of the Yahoo Messenger. Everything went fine initially, I started chatting and sharing files and images with my friends. It also appeared a bit too fast and I was really enjoying it. One day One of my friend in UK came online and he needed to speak to me vial messenger. So he started calling me. He also started sending me the message, "why are you not attending my calls?". It was at this point that I came to know that my friend was trying to call me via the messenger. But I can't see the call and I asked him to call again, but of no use. The I told him that I would call him back and started to call him. But I was really shocked when I was not able to find the Call button on the Yahoo Messenger. I searched everywhere on the messenger, but I couldn't find it. Then I searched over the net regarding this and came to know that the latest version in India does not have this function. I came to know that I need to install Yahoo Messenger 8.0 version and tried to search for that. At last I found a site which offered this version and download it from there. After downloading the Yahoo Messenger 8.0 version I was able to find the call buttons and started making calls to my friends without any problem.