Do you know where it's hanging ? (You could insert some print "Got to here\n"; lines to determine where it's hanging.) If it's hanging after $chan2->shell(); try inserting $chan2->blocking(0);.

I ran your script on a linux box (localhost) and here's the output:

Username/Password is correct
libssh2_channel_open_ex(ss->session, pv_channel_type, len_channel_type
+, window_size, packet_size, ((void *)0) , 0 ) -> 0x82cf7c0
Net::SSH2::poll: timeout = 250, array[1]
- [0] = channel
- [0] events 1
- libssh2_poll returned 1
- [0] revents 1
Net::SSH2::Channel::read(size = 1, ext = 0)
- read 1 bytes
- read 1 total
LINE :
Net::SSH2::poll: timeout = 250, array[1]
- [0] = channel
- [0] events 1
- libssh2_poll returned 0
- [0] revents 0
Net::SSH2::Channel::DESTROY
Net::SSH2::DESTROY object 0x8131de0
[download]

It didn't hang for me ... but then I suspect that's not the output you were looking for.

Update:With debugging turned off the output reduces to:

Username/Password is correct
LINE :
[download]

(On the same machine, 'hostname -a' returns nothing ... so the output looks about right to me.)

It would be a good idea to run the Net::SSH2 test suite against the server. (If you've already done that, did all tests pass ?)

Cheers,
Rob