You should redesign your forward primer to have a higher annealing temp. below 50c the Taq is too inefficient so it doesn't add the few nucleotide that allow the primer to stay bound once you raise the temp for elongation. If for some reason you can't change the primer than you can try to increase the annealing time or ramp the temp from annealing to elongation at a lower rate.

Dear Nashir,

Required bit details as follows:

I would re-design the primers so the annealing temperatures are closer to each other. I would also check to see if the primers work in general by running a reaction with the initial template (e.g. gDNA or BAC).