Register * You must register for access to some support pages  FAQ Search   Support Main Menu  Entry #510: Is PPA 6.6.09 compatible with MCP 21 SSR 63.0? Question Is PPA 6.6.09 compatible with MCP 21 SSR 63.0? Answer Yes, the 6.6.09 version of the Power Agent for MCP systems is compatible with MCP 21 SSR 63.0.