How does one change credit card number info on phone in and phone out?

Recently changed credit card numbers and can't find how to change card number status. I can go to edit section, but not sure how to change the number,,,any ideas?How does one change credit card number info on phone in and phone out?
Here's a link to Yahoo Messenger Voice Help where you will find the information you need to test your equipment, activate and use Yahoo Messenger Voice features:

http://help.yahoo.com/l/us/yahoo/messeng



Here is a link to a Yahoo Messenger 8 Help Request Form: http://help.yahoo.com/l/us/yahoo/messeng



Here is a link to Yahoo Messenger Beta 9 Help form:

http://help.yahoo.com/l/us/yahoo/messeng



Since they don't provide categories for EVERY problem or question type, pick one that fits as close as possible to your problem. Make sure to go into a lot of detail when describing your problem or asking a question.



Please note there is a HELP link at the top of your Yahoo Messenger which will take you to all sorts of information.