Problem with is_array() and empty() for $_SESSION...

Hi Everyone! I'm a little bit baffled by this problem. The sample script below showed that it should work but it doesn't because most of them returned false... --snip-- session_start(); print_r($_SESSION); //This one work because it spitted out datas from previous webpage... echo (!(is_array($_SESSION))); //This spitted out result as a blank... echo empty($_SESSION[USER_ID]); //This spitted out result as "1"... echo empty($_SESSION[CUSTOMER_ID]); //This spitted out result as a blank... echo empty($_SESSION[USER_LOGON1]); //This spitted out result as "1"... echo empty($_SESSION['PHPSESSID']); //This spitted out result as "1"... --snip-- It was working fine from before until I expanded the customer table by adding 6 more columns to it and updated the $_SESSION script by assigning the odbc_result data to each one of them (6 addition)... I have no idea what is the problem here... Scott F.