job scheduling for SSIS

I created SSIS package which executes from SSIS without problems. However, when I'm trying to schedule it through the Agent, I'm getting Error 14234: "the specified '@subsystem' is invalid...". Message recommends to run sp_enum_sqlagent_subsystems to find out which systems are supported and this list does not include SSIS. Probably I did something wrong during the installation. What can it be and how to fix this problem Or can this happen due to some other reason

Thanks