Need help for module position

I need to create some module position. I did:

# create a block in : "root-path\templates\t3\tpls\blocks" and named it positionname.php. the code like this below

# and then added

name

in "templateDetails.xml"

The template manager show me it is running but when i published something there that's not working. Do i missed anything ?

Waiting for your positive reply.