Add the appeal to the Appeals tab of the Campaign record
  1. Click Records
  2. Click Campaigns
  3. Click Open a Campaign
  4. Search for and open the appropriate Campaign record
  5. Click on the Appeals tab
  6. Click in the first blank row, and click on the binoculars that appear
  7. Search for and open the appropriate Appeal record
  8. Save and Close the campaign

OR

Unmark the option to Limit gift entry to appeals associated with this campaign
  1. Click Records
  2. Click Campaigns
  3. Click Open a Campaign
  4. Search for and open the appropriate Campaign record
  5. Click on the Appeals tab
  6. Unmark the checkbox to Limit gift entry to appeals associated with this campaign
  7. Save and close the campaign