Can anyone tell me if I'm doing something wrong?  I have been mining for days with no payout and I'm not sure if I should keep waiting or if something is set up incorrectly.

I'm mining Vertcoin on P2Pool using Cudaminer on my EVGA 780Ti.  

I chose this P2Pool host because of the statistics it looks like I can see on the status page, and they are updated in real time without refreshing.

I've been mining for days, and cudaminer reports "accepted" and the status on the P2Pool page shows a similar khps as my cudaminer.  But the status is always "No Shares Yet" ... there is a column for "Time to Share" but it is in no ways consistent... at 10 pm last night it says ~6 hours.  Now it says ~16 hours.  At some point the day before it had said ~9 hours.

I'm using the following script.  I am using the latest cudaminer... NOT the "modified" one from the Vertcoin website.  Could that be my problem?  I figured it was working fine since my hash shows up on the status page.  The modified client crashes no matter what I do.

cudaminer.exe --algo=scrypt:2048 -m1 -d GTX780Ti -b32768 -C2 -lt15x32 -i 0 -H 2 -o stratum+tcp://54.193.29.65:9171 -u VagH32wcMsjzPymjRiJPASE1xgE7bZDvqp -p password

At my hash rate of around 250 khps at scrypt:2048, would I have better luck mining something like litecoin?

Thanks for any advice.
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By the way, this is the status page for the P2Pool I'm trying...
http://54.193.29.65:9171/static/

You can see me chugging away, but that "time to share" just keeps fluctuating between 4 hours and 1+ day...

VagH32wcMsjzPymjRiJPASE1xgE7bZDvqp    281.09 KH/s   0.00 H/s (0.00%)   2.160 (141.54 K)   9h 9m 59s   no shares yet