Wonderware Historian not reading from remote WWRSLINX

I configured a Historian that has 22 data sources (all remote Wonderware nodes). Some are DASABCIP, most are DASMBSerial, and one is WWRSLINX using ControlNet. The node using ControlNet also has an Ethernet connection with DASABCIP and that data works fine; but the WWRSLINX status just shows "Disconnected." I tried changing from DDE to SuiteLink and back, but no luck. It worked initially and then stopped a few days later.