2001 Ford Taurus Transmission

My car is a 2001 Ford Taurus v6 3.0 single cam with 93100 miles on it. My problem is that when I'm at a stop it vibrates or misses. I kinda feel like when a plug or wire is not good. I already changed the spark plugs, wires, EGR valve, pressure sensor, and now the coil. Nothing makes a difference. Once I'm at normal speed 10mph and up it runs fine. Now it developed another problem. The light on the dashboard is on, the one that's a gear with an exclamation point inside it. I think it's the one for the transmission. Again when I'm at a stop and speed up it takes a while to gain speed like low power. I took it to AutoZone to get checked and it came back with a solenoid problem. I decided to check the fuses under the hood and the #28 fuse which has someting to to with the solenoid was blown. What's causing this?