I m using zoho crm api for callrecieved but when i was encrypting the parameter named as  encryptedvalue AES128

Encryption its giving reply that "FAILUREEncryption error. Check the parameters for encryption. "

As it is given the AES128 encryption is using  currenttime+callrefid+phonebridgenumber+customernumber

i m also also passing tese parameter but its not working for me.So any help would be apprteciated.