I can imagine you feel frustrated after not receiving forget Nextcoins.
It could be that you are on a forked blockchain, where you are the only one forging. Or in otherwords: you are not connected to the current stream of blocks with transactions anymore. Most likely this is the case, since it is quite difficult to get lots of Nextcoins while forging with a low amount of coins.
To check if this is the case, login to NRS, open the recent blocks page and check the base target for the latest block. If it has a percentage above 1000, you are most likely in a fork.
To recover from a fork: delete your old copy of NRS, download the latest NRS software, and use the new software. You will now download the latest blockchain.
Good luck!