Please Please Please Please Help Me! Loading Screen!

So basically i downloaded a game to my r4 revolution (silver) and then suddenly when i go on my r4 it says loading forever.... which is similar to the kind of problem you would get if you had no kernal. I replaced the kernal several times and even formatted it but still it didnt work. Please dont say its not genuine because ive been playing it for a year with no faults, or please dont say to buy a new one because r4 is not reliable.Any suggestions?Thanks in advance.

Does it stay on Loading when you turn on your DS, or when you try to start your games?
Is it an original R4? (What firmware are you currently using)
Do you have any other MicroSDs that you can try it with?

Nope i have no micro sd (spare) but my version of r4i kernal is 1.55

Is that the same firmware you used before? There are a couple different R4i's out there, and the firmwares from one usually doesn't work for the others.
And it freezes on loading when you first start your R4, right? Not when you go to a game?