Before requesting help, please go through the troubleshooting page to check if there is a better (faster) way of troubleshooting your problems. Please also keep in mind that requests made through the HPC Mailing List will be addressed quicker than those posted directly to an individual at HPC.
You may also want to search the HPC pages for your problem.
If you are unable to troubleshoot your problem through the above methods and are also unable to post a message to the Mailing List, then you should use the request-form to submit your request, giving all possible details about the error or problem you face.