Moment Rooted but Root apk's do'nt seem to work.

the applications in the market are designed for android phones in general and since root isnt really "officially" supported i wouldnt be surprised if it was implemented with different methods on different phones.

im not familiar with Ping from the market, but if the ping command, testing network latency, is the tool you're trying to get work, i would look into where this command is located on the different phones. it might be in a different directory on different phones or different versions of android.
from the terminal, i'd type find / -name *ping* and see what it returns and perhaps read up on the Ping program and see if they provide more detail on which versions of android or which phones they support, etc.

perhaps somebody on here has used this program successfully and can provide more detail.

For a second I thought you meant you just used the command line ping command (which does work, btw - sadly there's no way to kill it since we lack a ctrl key).

As mentioned, most of the root apps that I know of are based off the tmobile/htc phones. So stuff is implemented differently.

press Trackpad + C.

Thanks for the fast responce... Question Answered.. 

And thanks for the ConnectBot Info.. Nice App.