You can edit your ad by logging in to RollaNet Classifieds, then from the 'My Account' link, click the 'my active listings' link.
When the next window opens you will see your active ads. Click the 'Manage This Listing' button found below the ad you want to edit.
When the next page loads clcik the 'Edit' button (Image of a Pencil). (NOTE: Be careful not to click the 'Delete' button. You cannot restore the ad once it is deleted.)
Next choose the area you wish to edit (category, details, media) by clicking on the appropriate button. For example, if you want to change the wording in your ad you will want to click the 'Edit Details' button.
When you are satisfied with your changes click the 'Continue >>' button. On next page be sure to click the 'Finished Editing' button or your changes will not be saved.