Has this been happening to anyone else....recently some of my no 35 codes have been getting me banned....

for example, i logged on to the servers today and joined a game w/ just perfect shot prim. on and about 5 mins in i got the u've been detected cheating message then error 35!!!

this has happened on multiple occasions lately w/ codes that never used to ban. and im not using old codes, i update my db every week....

any ideas on why!?!?