usb stick/cardreader problem

After using CFP for a couple of weeks I noticed that it is impossible to connect a usb stick nor cardreader. When I try to acces or add data on these devices my pc freezes untill I disconnect the stick or cardreader. Even switching off CFP or allowing all trafic does not solve this problem. How can I get CFP configured properly??? I can’t imagine that a temp uninstall is the solution…
Activesync, printer and wifi, all connected by usb are working fine. Only when transfering data directly to the storage card in the pda is getting more and more difficult and sometimes impossible. BTW the log is filled with the networkmonitor: access denied protocol=IGMP (Networkcontrol rule ID=6)
After an unsuccesfull search this forum I hope someone could help me out of this misery…