Notes module not accessible?

(omitting API Key and TicketID):

http://crm.zoho.com/crm/private/xml/Notes/getAllSearchRecords?apikey=[API Key]&ticket=[Ticket]&searchWord=132749000000066170

I get the following result:

   
    <response>
    Unable to process your request. Kindly verify whether you have entered proper method name,parameter and parameter values
    </response>

Even if I change the searchWord to a word we have in our note title or description, we still get the same result.

I noticed that Notes is excluded from FIELD LEVEL SECURITY. Is that related to this problem?

Is the NOTES Module deliberately unaccessible?

P.S. And yes, we do have ParentID checked in the SEARCH LAYOUT for Notes, and when we enter the same number 132749000000066170 via your front end GUI, it successfully finds the 3 related records.

Thanks in advance for your help,

Evan