What information are you wanting to transfer to the phone? If it is pictures, you can view them on the phone from the SD card, but they have to be in the proper folder for the phone to be able to "see" them. Same goes for music.
I recommend removing the SD card, copying all the info you want to transfer or see on the phone to a folder or folders on your computer. THEN format the SD card in the phone. That should create all the folders the phone needs to see files on the card - My_Pix, My_Flix, My_Music or similar for pix, videos, music, etc. You can then move the file sfrom your computer into the appropriate folders on the SD card and they should then be viewable on the phone.
If this doesn't help, post back and we can try to help you further.