Sabeng,
If you can't give us any more information, I'm afraid we can't really help. As it says in the community rules:
"A good question will get good answers. When creating a new thread you must provide as much relevant information to your question as possible. This is not a banning offence but your post maybe edited/removed if we believe there is not enough valuable content to allow other members to answer it."
We need to know what you are using now that is not working, and we need to know the environment in which your transmitter and receiver will be operating. It would also help to know what type of transmitter/receiver you are using. Is it simply an infrared phototransistor, or is it complete infrared receiver module, and how do you have it connected? Are you pulsing the beam of IR light, or is it steady? It would help everyone on this forum, including yourself, if you answered in more than just simple, not to mention vague, sentences. I'm sure if you gave us more information we would be able to provide much more assistance.
Der Strom