Also, check mode is -bitch. When mode +bitch, you may only ban through the bot itself. Do .chaninfo <#channel> and it will tell you current modes. Then do .chanset <#channel> <modes> to change them.
I'va a problem with my bot. it removes all bans done bei @ users if this user bans a domain wich is the same as one of an op.
Means: if an op has foo@bar.com and an user has foo2@bar.com all bans of *!*@bar.com will be delteted. This is a problem because in germany many people use the same provider (t-online). Is there a way to disable the bots -b?