Thank you for taking the time to visit the Community to post your issue, although I apologize that you haven't received a response.
We will need a bit more information to be able to assist. Please take a moment to review the information here and post back with the year and version of Quicken you are currently running.
Are you having trouble adding this credit card account for the first time in a second file or has it already been added?
If the account had previously been added, do you receive any error messages?
The more information you can provide regarding this issue will help the Community to better understand and assist.