It seems either the authentication failed or you're not authorized to
use the TSA service.
Check if you have correct personal private key in the pfx file. You
can use keytool.exe (tool in your Java installation) in the console
window:
keytool.exe -list -storetype PKCS12 -keystore
C:\Users\mike\Desktop\privatkey.pfx -storepass [PUT_YOUR_PASS_HERE]
It should print something like:
Keystore type: PKCS12
Keystore provider: SunJSSE
Your keystore contains 1 entry
cn=YourX500DistinguishedName, 1.1.2015, PrivateKeyEntry,
Certificate fingerprint (SHA1):
29:CA:A5:91:D0:A2:DD:6D:9D:C3:2B:CF:1B:34:95:9F:00:CC:3F:54
-- jc