No sharing tab when i right click my wireless anyone know where it

> Im trying to share my internet connection which goes in via ethernet to the
> computer and used to come out of my wireless card which has an external
> antenna to be used with diffrent devices. But this time around when using
> Windows Vista, when i right click the connection bridge i make there is no
> sharing tab anywhere in properties so no devices can find my wireless to get
> an internet connection. Anyone know how i can get this to work? i know my
> wireless is working because i can find modems near by down my road but my
> devices cant find my internet connection.
>
> Help!