Linked server - Retrieve information on columns

[Lava]

I am trying to retrieve information on columns defined in the destination Unidata table. I am using linked server to connect to the table using Unidata ODBC driver.
When I issue below command:

select * from openquery(CADC1, 'select * from INFORMATION_SCHEMA.COLUMNS')

I get the following error:

OLE DB provider "MSDASQL" for linked server "CADC1" returned message "[Ardent][UniData ODBC Driver][IBM][SQL Client][UNIDATA]You have no privilege on file COLUMNS".
Msg 7321, Level 16, State 2, Line 1
An error occurred while preparing the query "select * from INFORMATION_SCHEMA.COLUMNS" for execution against OLE DB provider "MSDASQL" for linked server "CADC1".

Does any of you know how to query the destination to get the columns metadata?

Thanks,
Lava