Add-in Error forces exit

[Bob - Seattle]

Had been using latest Add-in Version 9.0.177.0 as means to fully participate in a Connect Web Conference run by NIH, who has an Enterprise scale implementation of Connect.
Was working fine until recently. Now when attempting to enter meeting, keep getting message that the Add-in has encountered an error and must exit. Error notes: AppVer: 9.0.177.0; ModName: kmw_dll.dll
No system modifications except recent recommended Microsoft patches for WinXP-Prof.
Running XP-Prof. SP2; IE 7; FlashPlayer 9.0.115.0
Reinstalled all the pieces. System passes Connect diagnostics page.
Suggestions?

[Bob - Seattle]

How to resolve problem with a dll?
Have realized this appears to be conflict with a dll for Kensington Mouseworks software ("kmw").