No shares accepted

[maverick528]

I have a pair of old USB Dragon scrypt miners, they have one GC3355 chip inside.
both sticks working together give about 500KH/s.
This USB sticks come bundled with cgminer 3.1.1 modified for them.
I was using them without a problem on another miner pool, now I moved to Prohashing.
The thing is that no matter how I config, I never get any shares accepted.
Everything seems to work fine, but shares are never accepted.
I tried with difficulty 512 and 1024.
I also tried setting one specific coin, first LTC, then tried trinity because I supposed the difficulty would be less, nice for using this old miners.
But never any valid share accepted......

Any ideas?
Help is greatly appreciated.

[maverick528]

the password field I tried included:
a=scrypt
n=miner1
d=512 or d=1024
c=litecoin or c=trinity or no c at all

so for example one of the combinations I tried is "a=scrypt n=miner1 d=512"

[AppleMiner]

You may need a newer copy of CGminer also, but the initial difficulty set by the pool means the low hashrate of that setup will take days before it will produce a share. I would advise against it, it likely will not be profitable.

[maverick528]

Hmmmmm so the difficulty for the first share is 65535, and then it is set at the value you programmed for the next shares?
As for profitability, I have the notebook turned on anyway most days, and that two sticks only use 5 watts each.
But if it can take days for getting the 1st share, that IS a problem.....

[maverick528]

This is very sad, this mining pool looks very nice to me, I was in another mining pool and moved here.
Now it looks like I can´t mine here at all.
On the other pool I was getting say 5K litoshis each day, I know it is nothing, but I also have a broken Gridseed board that I plan to repair and add to this two USB sticks to get a bit more hashing power on my side in the near future
I really will like to stay here.

[Steve Sokolowski]

This is very sad, this mining pool looks very nice to me, I was in another mining pool and moved here.
Now it looks like I can´t mine here at all.
On the other pool I was getting say 5K litoshis each day, I know it is nothing, but I also have a broken Gridseed board that I plan to repair and add to this two USB sticks to get a bit more hashing power on my side in the near future
I really will like to stay here.

You'll still earn the same amount of money as you would at the other pool; it will just have a lot more variance than you had there. You'll see large amounts of money credited infrequently, because the difficulty is so high.

[maverick528]

TYVM Steve for your answer, but mining for example 12 hours without a single share accepted is a waste of time, and its depressing.
I know small miners like me are not a priority for any pool, but maybe you can consider adding a "channel" with a lower diff.
Say, prohashing:3334 with a static diff of 1024 for example.
And with the answers Im getting here, maybe Im wrong but Im understanding now that the difficulty d= command in the password field is not working at all.