In addition to what Perry posted, There is no way for anyone to help you without know:
- What are your sensors?
- How are they connected?
- What libraries are you using?
- Have you tried the example from one of the libraries?
- What did you do that would make you think the sensors would change but didn't?
A general comment, You should disconnect all but one sensor and concentrate on that. Until you understand and have it working do not add the others. This includes sending data to excel. You must get each part working individually before combining them into one application.