Everyone loves this seven up pound cake i make but here lately the cakes have been falling what could the proble possibly be. SOMEONE PLEASE HELP I'm getting so discourged

can you go through exactly what you do and what is in the recipe and if you have changed anything seince before they fell, have you changed ovens?

Yes, it is hard to help you w/o more infol
If you have an electric oven, maybe one of the elements is burned out.