Root can't root htc tattoo...please help

[ISeeNoSounds]

Hello guys, yesterday i decided to root my Tattoo and flash Cyanogen.But i have a problem with the directory

/data/local/bin/

. After typing

adb shell "mkdir /data/local/bin"

i get an error that the file exists that should be fine. Then i type

adb push m7 /data/local/bin/

however i get this error

is a directory

but if i type

adb push m7 /data/local/bin

it starts copying........alright then

adb shell

and after that

cd /data/local/bin

aaand i am done...i get an error

can't cd to cd /data/local/bin

.I tried with rtattoo but i get some data/local/bin errors again .I tried with the androot aplication but it doesn't seem to give me full rights scince when i tried to flash ClockworkMod i get some permission errors.

thanks for the answers in advance guys ;]]