Jared, my apologies to both you and Frank.
After connecting to my mount with just PHD2 or SGP, the EQASCOM RA clock is incrementing, but the mount itself is not tracking.
Previous to this, I uninstalled and reinstalled ASCOM 6.2, EQASCOM 1.29a, and the current version of PHD2 in the hopes that something was corrupted.
At least I know it's a connection issue that probably involves EQASCOM. Any suggestions on troubleshooting?