CA ARCserve Backup Patch Manager error while updating

Hello,
Patch Manager unable to download or connect to ARCserve download server when server is configured to use proxy settings for Internet connection. When clicked on 'Check for updates' button in patch manager GUI I get this error. Any solution ?
Thank you!

Checking updates for CA ARCserve Backup failed. Operation failed with code: 502. Please contact CA technical support.
OK
