Does that object support ping? Ping is not TCP-based, it’s an ICMP.
I use a shell object for this kind of thing (Mac only). Below is an example that pings the main Google DNS just once. The shell object I use (dhj.shell) can be downloaded from http://max4eigenharp.com/?p=83
-- Pasted Max Patch, click to expand. --
Copy all of the following text. Then, in Max, select New From Clipboard.