Well thanks God my 5th gear problem is solved finally. Well the mechanic concerened who is also a good electrician traced the fault. Nothing was coming on the computer check, i mean any fault. So he started checking all the points like Relay No 9, then the switch which is attached with the gear shifter lever which from the "D" drive can be shifted for manual, and the last connection of the swith which goes in the transmission oil pan through the switch mentioned above.

He lifted the rear left wheel of the car with a jack and then two guys sat in the car one on the driving seat and the other on the passenger side. The guy who was on the driving seat was responsible for ecclerating the engine (Spellings) uptill 100 KM. The other one from the passenger side had opened the gear shifter campartment and had given direct jump with a wire (From The shifting Switch) At once the car after getting the speed of 110 Km went into the fifth gear. So he took one new swith from the market and the problem is solved

The moment the fifth gear started working it gave a new life to the car engine. The downshifting started automatically. So it is proved that when the 5th gear in my car make and model is not working the car starts moving at a snail speed and there is no downshifting of gears also

Hope this might help for those who are moving with this problem

Cheers