Problems with SELECT

I am having a problem with SELECT. The table has 3 rows. I am using
the C api. Here is my C code.

count = mysql_query(my_db, "SELECT * FROM accounts");
er = mysql_error(my_db);
res = mysql_use_result(my_db);
num_row = mysql_num_rows(res);

count is returned as 0 (no error)
er is NULL (no error)
res is trturned valid
num_row is returned as 0

I have full permissions to the data base and its tables. I can retrieve
data from other tables in the database.

Does any one have an idea as to what is amiss here. I can add to the
table and get the correct error when I try to add or update the table
with duplicate key fields.

Thanks Richard