How come micro sd hc 8gb card will not work in my htc fuze?

I have a new HTC Fuze and first installed a 4gb micro sd card that works fine. I bought a 8gb micro sd hc card and it will not work…Why?
how would i format it?

How to install custom firmware on a htc fuze?

can you install custom firmware on a htc fuze and if u can than how to you do it?

How to get pics from the HTC Fuze to my computer?

I have the HTC Fuze and i was wondering how to take the pics from it and put them on my computer, using the cable?