Solo mining low difficulty coins

So if you are mining a low difficulty coin like Newyorkcoin solo does the dynamic difficulty interfere with your chance to find a block. The difficulty is only 400 or so for that coin. I would imagine that you would want to submit as many shares as possible to have the best chance to find a block. Is the block difficulty and the static/ dynamic difficulty two different things independent of each other?

i'm not sure what you mean by block difficulty, but there's network difficulty for each coin reflected by the whole network's hashpower on that coin, and the pool's share difficulty which is set by the pool or password arguments if it's a valid number.
the minimum static difficulty for scrypt right now is 65536, dynamic difficulty starts at 65536 but will go down to 32768 or 16384 with smaller miners (like 4 or 5 mhs), and then bounce around between 32768 and 16384. i don't understand why they can't allow static difficulty to match what dynamic does.
anyways, i don't think it affects chances of finding blocks much unless the difficulty changes cause more errors or rejects. but i get what you're saying, difficulty too high and you're sitting there watching new blocks go by while it's not finding shares fast enough to even submit one before a new block is detected.

also a note on scrypt difficulty in general: a scrypt difficulty of 1 is multiplied by 65536 so if newyorkcoin's difficulty is 900 you would have to have a setting of 65536 x 900 = 58982400 in the scrypt miner to always solve a block every time a share is submitted like in getwork protocol solomining to your own local wallet. and of course shares too small don't count for anything because they didn't solve a block, unless they merge mined something and that merge mined block was solved then you get whatever you merge mined paid out in the solo mined coin, which is one perk of solo mining here