Please give me a help.

Dear sir:

Following is one part of program to connect to postgresql server.

const char* conninfo="host=192.168.8.2 port=5432" database=log username=tom password=xxx;
PgDatabase pgdb(conninfo);
if (pgdb.ConnectionDb())
{
printf("connection server error!");
exit(0);
}
printf("connection server ok.");

When compile it ,
Always appears "request for member connectiondb in pgdb ,which is of non-aggregate pgdatabase .

Thank you for your help.

Jason