Error running chart - (WWV-11230)

Question

I'm attempting to create a chart that displays the number of users per organization based upon data in the portal30.wwsec_person$ table. There are no errors reported while creating the chart, however, when attempting to run it, the following is returned.
ORA-00942: table or view does not exist (WWV-11230)
Failed to parse as PORTAL30_PUBLIC - select null, CompanyName, count(*) from person group by CompanyName (WWV-08300)
It appears the package or procedure is attempting to run as PORTAL30_PUBLIC and there may be some priviledges missing. As this is my first chart, I will accept any assistance possible which includes directing me to any documentation I may have overlooked. Thanks.
null

Answer 1

One more thing, here's the table structure.
TABLENAME is 22 characters long.
Reports from the table work fine.
Name Null? Type
ID NOT NULL NUMBER
USERNAME NOT NULL VARCHAR2(30)
TITLE NOT NULL VARCHAR2(30)
FIRST_NAME NOT NULL VARCHAR2(60)
LAST_NAME NOT NULL VARCHAR2(60)
PASSWORD NOT NULL VARCHAR2(200)
PASSWORD_HINT NOT NULL VARCHAR2(255)
COMPANY_NAME NOT NULL VARCHAR2(150)
EMAIL_ADDRESS NOT NULL VARCHAR2(256)
STREET_ADDRESS_1 NOT NULL VARCHAR2(60)
STREET_ADDRESS_2 VARCHAR2(60)
CITY NOT NULL VARCHAR2(30)
STATE NOT NULL VARCHAR2(30)
ZIP NOT NULL VARCHAR2(30)
COUNTRY NOT NULL VARCHAR2(256)
PHONE NOT NULL VARCHAR2(30)