CGI Help

Hi,

I have a cgi script that runs fine under command-line

But when execute from a client browser, I get CGI Error
The specified CGI application misbehaved by not returning a complete set of
HTTP headers. The headers it did return are:

It seems like it is not able to connect to the host.

here's what I have in my pg_hba.conf
local all trust
host all 127.0.0.1 255.255.255.255 trust
test all 192.168.38.0 255.255.255.0 trust

executing from client browser
http://www.test.com/cgi-bin/test.cgi

int main()
{
char *queryString, *contentTypeFromPost, *contentTypeLength;
int icontentLength, i, j;
char database[100], *p;
char contentType[] = "text/html", TheDomainName[100], thisfax[25];
char today[81];
ItemList items, *orderlst = NULL, *ip;
char state_code[3]; /* holds state code
entered by user
char query_string[256]; /* holds constructed
SQL query */
PGconn *conn; /* holds database
connection */
PGresult *res; /* holds query result
*/

/* setup the html document header */
printf("Content-Type: %s\n\n", contentType);
conn = PQconnectdb("dbname=template1"); /* connect to the
database */

if (PQstatus(conn) == CONNECTION_BAD) /* did the database
connection fail?
{
printf("Connection to database failed.\n");
printf("%s", PQerrorMessage(conn));
return(1);
}

strcpy(query_string, /* create an SQL query
string */
"SELECT * FROM cities");

res = PQexec(conn, query_string); /* send the query */

if (PQresultStatus(res) != PGRES_TUPLES_OK) /* did the query fail?
*/
{
printf("SELECT query failed.\n");
PQclear(res);
PQfinish(conn);
return(1);
}

for (i = 0; i < PQntuples(res); i++) /* loop through all
rows returned */
{
printf("%s\n", PQgetvalue(res, i, 0)); /* print the value
returned */
printf("%s\n", PQgetvalue(res, i, 1)); /* print the value
returned */
printf("%s\n", PQgetvalue(res, i, 2)); /* print the value
returned */
}
PQclear(res); /* free result */

PQfinish(conn); /* disconnect from the
database */

return(0);

}