Question About Proxy Setting and intranet readings?

Hi,

We have set a proxy server to access Pubmed. However after that, whenever I try to read a url like

http://servername:serverport/jobs/username/runid/result.txt

by a delimited text reader, it comes with error: http request 'http://servername:serverport/jobs/username/runid/result.txt' to proxy server

'proxy.proxydomin.net' failed. 404 - Not Found.

Did any one have suggestions?

Weilin