Response data page is blank for my API call.

I have a api call (starts with http)
In the listner 'View results in tree' response data is null.
I am posting sample results and request below and reposnse data is blank.

Sample result:
Thread Name: TWC_NationalForecast 1-1
Sample Start: 2009-08-18 17:49:46 PDT
Load time: 5
Latency: 5
Size in bytes: 1461
Sample Count: 1
Error Count: 0
Response code: 200
Response message: OK

Response headers:
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Pragma: No-cache
Cache-Control: no-cache
Expires: Wed, 31 Dec 1969 16:00:00 PST
X-Powered-By: Servlet 2.4; JBoss-4.2.3.GA (build: SVNTag=JBoss_4_2_3_GA date=200807181417)/JBossWeb-2.0
Content-Length: 1461
Date: Wed, 19 Aug 2009 00:48:57 GMT

HTTPSampleResult fields:
DataEncoding: ISO-8859-1



[no cookies]

Request Headers:
Connection: keep-alive

Anybody please suggest me, is this due to my jmeter settings or with my project settings? because I have tried different project API call and I could see response data clearly.