yeah, my clanmates got accused of using macros by noobass server admins in an esl match and they refused to let us pause the game to fix the problem... grr 90% of esl teams are lifeless!
Anyway back on the topic im sure that is what is causing the problem...
the server admin has set "pb_sv_restrictions" to 2 which is more stringent on its macro checks and it seems your mouse is triggering the kick... i have heard but cannot confirm that updating the drivers fixes this issue