I'm not sure about cryptopool, but we were having problems submitting blocks to the network, even after fully recompiling the source. This is why we decided to remove support for the coin.
As I said before, it may have been something with the configuration of the pool, but it's just strange that the same (looking) issue should appear for both.
It sounds interesting. But yesterday night I was able to solo mine using a linux compiled cancercurecoin-qt, and now I can solo mine with the released windows wallet
Maybe its the non-QT interface that has problems? I didn't test that