Internet banking - Why cant I ...............

I use my banks internet facilities. Until approx 6 months ago I successfully used my google chrome browser to get me to the bank home page. Having entered the required information, it often tells me that connection has failed or site unavailable, which is a pain. This happens about 60/70% of the time (Day or Night)

If I use internet explorer - it connects without problems each time. Is there something obvious here that I have failed to configure, or possibly a box that should be ticked?
Thanks in advance for your input.

Thanks..........
good thought, tried immediately after reading your comment, but no change regrettably.

your credentials may have expired i.e. password...