flock can not help in browsing gmail

I am using flock for last one year. Recently I downloaded flock 2.5.2 (en-US). Though it was working well, but now for few days, I find when I log on to my "gmail account ", message appears as "unable to reach gmail due to poor connectivity". The connectivity I have checked and it was in peak performance. However, when I am browsing other sites through flock, it does not poses any problem at the same time. The only problem stands with browsing "gmail account" through flock and that is too for last few days. Can u please guide me which are the areas I should check so that I can happily go through my gmail account through flock. I have tried uninstalling and reinstalling flock repeatedly, but the problem stands as it is. I have no option for any other browser excerpt flock. Anticipating a smart solution from your end. Thanks,