请教Gmail phone问题

I tried to use gmail phone for a conference call the other day. I dial the access number, then the phone announced “If you want to attend the meeting, press 1. …..”. I pressed 1, but it didn’t lead me to the conference, still the message “if you want to attend the meeting, press 1. …..”. I pressed 1 many times, no luck.

 

I wonder if anyone has the similar problem. How to solve this problem?  Thanks.