Yes, Did it. Still not working. Went to LG once again, tried almost 5 Writers have the same problem. Final solution to it was, went to my dealer and told him about the problem and got the 22x writer. Now, burnt 5 Dl DVD's today. Not even a single disc went corrupt. Thanks to my dealer, one of my friend, punker and the rest.
BTW, people i have heard that the model GS24NS50 model has lots of Issues burning DL DVD !!