I can't seem to get results using the searchRecords method when searching on a custom module.  My call looks like this...

https://crm.zoho.com/crm/private/json/CustomModule2/searchRecords?authtoken=MYTOKEN&scope=crmapi&criteria=(FIELD NAME:VALUE)&newFormat=2

Response is {"response": {"uri":"/crm/private/json/CustomModule2/searchRecords","error": {"code":4832,"message":"API call cannot be completed as the Criteria parameter contains empty field name"}}}