Sharepoint Foundation 2010 - Search service cannot start

Hi,

I'm trying to start the Search Service on SharePoint Foundation 2010 SP2, but I get the following error:

Could not access the Search administration database. A generic error occurred while trying to access the database to obtain the schema version info.

However the search database is well created during the process and I've checked that Shared Memory is enabled for SQL Native Client.

Can you please suggest me on this

Thanks