The recommended version of the BOINC client is now 7.4.22 for running ASIC miners. There may be work fetch problems with other versions.
The following cc_config file is also needed for ASIC miners. The file goes into your 'ProgramData' - 'BOINC' Folder.
If you have more than 1 x miner, then to get 1 work unit running on each of them you need to increase...