radiusd run time problem

[Abul Monsur Mannan]

Dear FR users,

I'm new in this field . I need your help.

When I execute at root - #radiusd -X the following error message is returned.

radiusd.conf[14]: sql: Module instantiation failed.
radiusd.conf[1798] Unknown module "sql".
radiusd.conf[1727] Failed to parse authorize section.

I've done all the steps that stated on Onlamp's webpage.

Could you pls help me out and guide me with full  linux command?

I'm looking for your kind

Thank you.