It must be some kind of problem... what setup do you use? win32 or 64?
Win64. This is my setup: minerd.exe --url http://work.mmcpool.com:80 --user M92QAURY1e4BsoDdqx5pKeS7UJi6zUHv6H --pass x --threads 4
Your CPU might not support AES, what model is your CPU?
Phenom II x4 820 and 3x Core2 Quad Q6600's. They should, I know they don't perform great like the newer cpu's, but I'm on a budget for cpu mining.
Q6600 does not support AES-NI
http://ark.intel.com/products/29765/intel-core2-quad-processor-q6600-8m-cache-2_40-ghz-1066-mhz-fsb
I know, I posted after that post that I found out.
The Proof of Work is a modified Momentum based algorithm. It has a small SHA512 component, and a large AES component - chips with AES-NI instruction sets will fare *much* better. Each hash requires 1GB of Memory to perform and encrypts 50GB of data. By contrast, the verification only requires 128K and less than one 10th of a second.
See that, it's not requirement to have AES-NI. At least AES is required, which most 64-bit cpu's do, even old ones. So, the cpu's I have will just be slow at hashing, might be better I mine PTS, buy and/or trade for MMC.