The black disengage button had come lose and want let me shift into park, drive, reverse or neutral there are no wires attached to the button it will pop right out if removed how do I fix this.

Have someone check your motor mounts and your shift linkage for wear, binding, and or damage from car accident or from foreign object under the car.
Problem should be in one of those areas.

Sounds like the reverse band or servo has gone out. Transmission shop needed for a confirmation.

Maybe something wrong with neutral switch? Usually it is on or close to transaxle shift lever, follow the shift cable to shift lever, the switch has multiple wire connector.
It may be possible to start vehicle by jumping the load side of starter relay, key on. There are safety issues trying this, the vehicle will crank in any gear. Make sure tranny is out of gear, parking brake is set, block the wheels, whatever it takes to be safe, safety is your responsibility.
If the problem isn't that neutral switch, then I don't know? Any applicable trouble codes?

Your safety interlock switch is going out or is not adjusted properly. There is a procedure for adjusting the switch. The switch is on the transmission in the engine compartment. If you want to adjust the switch, loosen the botls holding the switch and follow steps 7-8 below. Else, you can just replace the switch entirely by following all steps.

The neutral start and backup switch are one unit mounted on the top left end of the transaxle. The neutral start portion of the switch allows electrical current to travel to the ignition system when the shift selector is in park or neutral only. The vehicle will not start when the selector is in any other gear. The backup portion operates the rear backup lamps when selector is in the reverse gear.

REMOVAL & INSTALLATION See Figures 1 and 2

1. Make sure the shift selector in the Park position, then apply the emergency brake.
2. Disconnect the negative battery cable.
3. Disengage the neutral start switch electrical connector, then remove the shift control lever on top of the switch.
4. Remove the two neutral switch attaching bolts, then remove the switch.

Fig. Fig. 1: Neutral safety switch location-vehicles equipped with automatic transaxle

Fig. Fig. 2: Adjusting the neutral safety switch

To install:

1. Install the switch on the manual shaft.
2. Loosely install the two attaching bolts and washers.
3. Insert a No. 43 drill (0.089 in.) through the hole.
4. Tighten the attaching bolts to 7-9 ft. lbs. (9-12 Nm), then remove the drill.
5. Engage the switch electrical connector, then connect the negative battery cable.

Shifting to NEUTRAL
To shift the transfer case to NEUTRAL, first make sure
the vehicle is parked so that it will not roll:
1. Set the parking brake.
2. Start the vehicle.
3. Connect the vehicle to the towing vehicle.
4. Put the transmission in NEUTRAL (N) or have
the clutch pedal pressed for vehicles with
manual transmission.
5. Shift the transfer case to 2HI.
6. Simultaneously press and hold the 2HI and
4LO buttons for 10 seconds. The red NEUTRAL
light will come on when the transfer case shift to
NEUTRAL is complete.
7. Shift the transmission to REVERSE (R) for one
second, then shift the transmission to DRIVE (D)
for one second or FIRST (1) for vehicles with
manual transmission.
8. Turn the ignition to OFF.
9. Place the transmission shift lever in PARK (P) or
FIRST (1) for vehicles with manual transmission.
10. Release the parking brake prior to towing.

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Shifting Out of NEUTRAL
To shift out of NEUTRAL:
1. Set the parking brake and apply the regular
brake pedal.
2. Start the vehicle with the transmission in PARK (P)
or FIRST (1) for vehicles with manual transmission.
3. Press the button for the desired transfer case position
(2HI, 4HI, AUTO 4WD or 4LO).
4. Put the transmission in NEUTRAL (N) or press the
clutch pedal for vehicles with manual transmission.
5. Shift the transmission lever to the desired position.
After the transfer case has shifted out of NEUTRAL,
the red light will go out.
6. A re-engagement sound is normal when shifting out
of NEUTRAL.

Try this: shift into neutral, wait a few seconds, then try to disengage. If it doesn't work, try again, but turn vehicle off after shifting into neutral, wait about 15 seconds, hopefully that will do it.

Look in your owner's manual under fuses. There is a fuse for brake shift lock solenoid (fuse #1). You can still drive your car by turning the key on just enough to shift to neutral, and then starting it in neutral. You can shift to drive and reverse, but if you shift to Park then you have to turn the engine off and proceed as previously

you need to readjust your cable.

You may need a new automatic clutch or new transmission. This occurs often in Fords, mostly because people get lazy when shift gears and do not fully disengage gears, but rather pull up and down. See your mechanic.

I initially tried to override the Brake / Transmission switch by disconnecting the battery but that did not work. I solved the problem by disconnecting the wiring from the actual gearbox, and manually moving the linkage at the gearbox. After doing that everything was re-connected and now works fine.