You can turn them back on by selecting "Internet Options" from the "Tools" menu in Internet Explorer (IE) then select the "Privacy" tab. Once there, you can check your cookie acceptance settings by clicking the "Advanced..." button.
The "Advanced..." button opens another control panel titled, "Advanced Privacy Settings." Ensure that First-party Cookies are accepted. Also consider checking the "Always allow session cookies" checkbox.
An alternative is to retain your current cookie settings, but just override them for this site. This can by done by clicking on the "Edit" button on the Privacy tab.
Once at the "Per Site Privacy Action" panel you can enter http://www.aceit.com in the "Address of Web site" box and click the Allow button. Once the domain appears in the "Managed Web sites" list, "OK" button your way back to the site.