I'm having the same issue.
When going on duty as the LSPD, LSSD, or SAHP I have zero problems.
But if I go on duty for BCSO things go haywire. Everything seems fine at first but none of the base lspdfr menus will work anymore (other menus like Ultimate Backup do work), I wont get any callouts, I can't pull someone over, or get a reply to a plate/ped check/any radio request.
I'm also using EUP. Maybe there's a typo in the configuration xml's?