SQL error: could not connect to database

I am trying to connect to  database using ECPG  called 'database' - please  see the code below-.  When I am excuting
thecode I am getting this message  

Fatal error
SQL error: could not connect to database "database" on line 22
Fatal error
SQL error: connection "NULL" does not exist on line 23


How can I make the ECPG access my database. I have already configured my database to trust all local connections and I
canlog in to postgresql without password prompt using the psql tool. where did I make a mistake and what are the
configurationI need to do 

I am using libecpg 6 and postgresql 8.4.4

Best,


#include <iostream>

using namespace  std;

EXEC SQL whenever sqlwarning sqlprint;
EXEC SQL whenever sqlerror do GiveUp();

void GiveUp()
{
fprintf(stderr, "Fatal error\n");
sqlprint();
}
int main()
{

    EXEC SQL BEGIN DECLARE SECTION;
        char id [] = "database";
    EXEC SQL END DECLARE SECTION;
    EXEC SQL CONNECT TO :id;
    EXEC SQL CREATE USER tom WITH PASSWORD 'myPassword';
    EXEC SQL DISCONNECT ALL;

return 0;
}