I have tried two Kenwood G707s with three of Jim's URI Adapter cards and two URIs on two different computers.  I am able to get three or four commands (freq, pl tone, etc) then I will get Allison saying "Invalid Frequency" and the CLI shows: 

"WARNING[7925]: app_rpt.c:13876 serial_remote_io: -99999 Serial device not responding on node 1010" 

The radio will not steer or accept commands anymore until I power cycle the 707.  The after power cycle three or four commands and will not steer again.  I have tried the same computer with a VHF Syntor with an xcat and will accept every command without issue.  Also one of my 707s now lives on a Quad PCI card and steers with every command without issue.  Has anyone else seen this or know the remedy?  Below is my rpt.conf with the URI: