[Users] Pike module

Hi, i want to use pike module to avoid brute-force attack on Register. are the values of the parameters expressed in seconds? it seems that there is a problem because i've set: modparam("pike", "sampling_time_unit", 30) modparam("pike", "reqs_density_per_unit", 10) modparam("pike", "remove_latency", 600) and the routing logic is: if (method=="REGISTER") { # Checks brute-force attacks if (!pike_check_req()) { sl_send_reply("403", "Too many attempts!"); break; }; if (!www_authorize("caspur.it", "subscriber")) { www_challenge("caspur.it", "0"); break; }; save("location"); break; }; but when I reach the limit it blocks the requests only for less than 1 minute... where is the mistake?any idea? thanks, Stefano