You will get a similar message in the probe test connecton or probe log:
sap_basis (12) login failed, Connector path is not correct, path does not contain sapjco3.dll and sapjco3.jar.
Confirm the variables as described in the probe documentation ie.:
Content of d:\sapjco:
2.02 or later requires additional files in the sapjco folder. It should contain
Release : 9.x or later
Component : UIM - SAP_BASIS
Correct sapjco folde so just download it from Sap Market place with the Sap Administrator help and then apply the probe.
Sap_basis 2.01 version should work as a workaround