Although it is mining with MTP, I do not know the reason,
but more than half rejected occurred at 2Miner.com.
In zergpool it was 1/10 rejected.
Tentatively, it is a report.
Which version did you run? Did mintpond work for you?
Version is Beta 5 ip1.
Regarding mintpond, occasionally rejected is displayed,
but the reason of rejiected is also displayed, diff is displayed and it was able to move well.
zergpool works well, but only 2 Miner was rejected a lot.
Since you are doing solo mining, you can not choose 2 Miner or zergpool.