....there is always extreme way of testing xvm and force disabling it without need of messing with your xvm presets or installations. (not recommended)
1. go inside wot/mods/1.5.1.1 and move com.modxvm.xfw folder outside (this will disable xvm for you)
2. put com.modxvm.xfw folder back inside 1.5.1.1 (to re-enable it)
...less trouble
Did you try without sound mod or artyhitlog and infopanel?