Teac Cassette Deck I Have A Teac System But I Cant Seem To Be Able To Use My Remote On My Cassette Deck ? Can Anyone Help Me Thks

I have a teac system but i cant seem to be able to use my remote on my cassette deck ? can anyone help me thks - teac cassette deck

I have a stereo system with the RU-407 TEAC remote control unit, but I can not on my cassette deck can someone help me, thank you .... Work Hotti