In addition to what Kiran’s answer suggests, make sure this is set correctly:
There is an option to in SSIS to save passwords(to access DB or anyother stuff), the default setting is “EncryptSensitiveWithUserKey”… You need to change this.
Package Proprties Window >
ProtectionLevel — Change that to EncryptSensitiveWithPassword
PackagePassword — enter password-> somepassword