@benazir: I have tried every possible option which I could. But wasn't able to remove this blockage thing. My previous as well as new employer told me that this can only be removed if you have some very strong reference in Labor Ministry. But unfotunately, I wasn't able to find any one in Labor department. Anyways, after utilizing all my energies for a month, I asked my new employer to arrange a fresh visa for me. And now I came back on 31 Aug with a new visa. Hope this clarifies.