Ramesh,
Sorry for the delay. According to the data shown, there are no SVs being tracked. These sorts of results are given when those SVs are detected, and then lost. All indications are that the software is functioning normally, and that the CC4000 is being communicated with correctly. This means that the problem is most likely the quality of the signal getting to the chip. This can come from either environmental or hardware issues
Regards,
Aaron