There is a new v2.10 release of the PC nexus mining software that fixes problems with nexuspool.ru. The file is available on the downloads page. Also there is a new 2.3GH/s CVP-13 nexus bitstream also on the downloads page. This is the first fast/rough nexus build on the CVP-13 and is nowhere close to using the card to its full potential. You should run it at 850-880mV and 550-560MHz.