"It turns out the messages saying "Stratum difficulty set to..." mean that the mining software is automatically adjusting its difficulty, in order to produce the optimal number of shares for the stratum server. If the difficulty is set too high, the local software will never be able to send any shares before the next block comes along (and it needs to request new work from the stratum server). However, if the difficulty is set too low then the miner will waste time fetching new work from the server when it could have been more productive producing a share from the old work.
Basically, these messages mean that ccminer is working OK, but hasn't yet found the optimal difficulty so is automatically negotiating this with the stratum server."
Found this quote after googling your problem, not sure if it will fit the issue. The author goes in depth on adjusting difficulty in his article
HereI wish I could give you more anecdotal information, sorry. Good news is that the article was posted recently and the author is open to inquiries.
Edit: Another thing, Can you tell me what error it is you are running into? Are you getting some kind of run time error? Just telling us what you are putting in and getting out doesn't really give much to lead on to for a diagnosis. If you can, take a screenshot of the error and I'll do my best to try and help.