Try opping the bot first...
SOP grants your bot access to various commands through chanserv (which it natively is completely unaware of), but does not give your bot any privileges to change modes, kick, etc on the channel. It will have to be opped first, either by another op, or by chanserv...
Of course..
If you don't have operator stats, you can't kick/ban/change modes either, regardless wether you're an AOP, SOP, or FOUNDER... It's not a limitation of eggdrop, but the way irc servers work.