When generating a PDF the user got the following error message - <urlopen error [Errno 2] Temporary failure in name resolution>

An error occurred while generating a PDF of this report: Failed to fetch PDF from appserver at http://splunk.dcc.fexco.ie:8000/en-US/report/:

python.log shows:

2010-08-25 14:16:29,454 ERROR An error occurred while generating a PDF of this report: Failed to fetch PDF from appserver at http://splunk.dcc.fexco.ie:8000/en-US/report/: <urlopen error [Errno 2] Temporary failure in name resolution>  
2010-08-25 14:17:09,458 ERROR An error occurred while generating a PDF of this report: Failed to fetch PDF from appserver at http://splunk.dcc.fexco.ie:8000/en-US/report/: <urlopen error [Errno 2] Temporary failure in name resolution>  

When I tried using both the hostname & the ip of the remote splunk server in the reportServerURL. The file, /Applications/splunk4/etc/system/local/alert_actions.conf currently looks as follows:

[email]
inline = 0
reportServerEnabled = 1
reportServerURL = https://adtest.dcc.fexco.ie:8089/services/pdfserver/renderpdf

it still isn't working. What could be the issue?